Question

MATHEMATICS
EXERCISE 4.2
(a) x – 1 = 0
(b) x + 1 = 0
(e) y - 4 =-7 (f) y - 4 = 4 (g) y + 4 = 4
Give first the step you will use to separate the variable and then so
(d) x + 6 = 2
(h) y + 4 = 4
sub
(i.e
fro
nu
2. Give first the step you will use to separate the variable and then solve the equation​

Answer 1

ANSWER

(a) x–1=0

(a) x–1=0(b) x+1=0

(a) x–1=0(b) x+1=0(c) x–1=5

(a) x–1=0(b) x+1=0(c) x–1=5(d) x+6=2

(a) x–1=0(b) x+1=0(c) x–1=5(d) x+6=2(e) y–4=–7

(a) x–1=0(b) x+1=0(c) x–1=5(d) x+6=2(e) y–4=–7(f) y–4=4

(a) x–1=0(b) x+1=0(c) x–1=5(d) x+6=2(e) y–4=–7(f) y–4=4(g) y+4=4

(a) x–1=0(b) x+1=0(c) x–1=5(d) x+6=2(e) y–4=–7(f) y–4=4(g) y+4=4(h) y+4=–4

(a) x–1=0 ⇒ x–1+1=0+1 [Adding 1 both sides]

(a) x–1=0 ⇒ x–1+1=0+1 [Adding 1 both sides]⇒ x=1

(a) x–1=0 ⇒ x–1+1=0+1 [Adding 1 both sides]⇒ x=1(b) x+1=0 ⇒ x+1–1=0–1 [Subtracting 1 both sides]

(a) x–1=0 ⇒ x–1+1=0+1 [Adding 1 both sides]⇒ x=1(b) x+1=0 ⇒ x+1–1=0–1 [Subtracting 1 both sides]⇒ x=–1

(a) x–1=0 ⇒ x–1+1=0+1 [Adding 1 both sides]⇒ x=1(b) x+1=0 ⇒ x+1–1=0–1 [Subtracting 1 both sides]⇒ x=–1(c) x–1=5 ⇒ x–1+1=5+1 [Adding 1 both sides]

(a) x–1=0 ⇒ x–1+1=0+1 [Adding 1 both sides]⇒ x=1(b) x+1=0 ⇒ x+1–1=0–1 [Subtracting 1 both sides]⇒ x=–1(c) x–1=5 ⇒ x–1+1=5+1 [Adding 1 both sides]⇒ x=6

(a) x–1=0 ⇒ x–1+1=0+1 [Adding 1 both sides]⇒ x=1(b) x+1=0 ⇒ x+1–1=0–1 [Subtracting 1 both sides]⇒ x=–1(c) x–1=5 ⇒ x–1+1=5+1 [Adding 1 both sides]⇒ x=6(d) x+6=2 ⇒ x+6–6=2–6 [Subtracting 6 both sides]

(a) x–1=0 ⇒ x–1+1=0+1 [Adding 1 both sides]⇒ x=1(b) x+1=0 ⇒ x+1–1=0–1 [Subtracting 1 both sides]⇒ x=–1(c) x–1=5 ⇒ x–1+1=5+1 [Adding 1 both sides]⇒ x=6(d) x+6=2 ⇒ x+6–6=2–6 [Subtracting 6 both sides]⇒ x=–4

(a) x–1=0 ⇒ x–1+1=0+1 [Adding 1 both sides]⇒ x=1(b) x+1=0 ⇒ x+1–1=0–1 [Subtracting 1 both sides]⇒ x=–1(c) x–1=5 ⇒ x–1+1=5+1 [Adding 1 both sides]⇒ x=6(d) x+6=2 ⇒ x+6–6=2–6 [Subtracting 6 both sides]⇒ x=–4(e) y–4=–7 ⇒ y–4+4=–7+4 [Adding 4 both sides]

(a) x–1=0 ⇒ x–1+1=0+1 [Adding 1 both sides]⇒ x=1(b) x+1=0 ⇒ x+1–1=0–1 [Subtracting 1 both sides]⇒ x=–1(c) x–1=5 ⇒ x–1+1=5+1 [Adding 1 both sides]⇒ x=6(d) x+6=2 ⇒ x+6–6=2–6 [Subtracting 6 both sides]⇒ x=–4(e) y–4=–7 ⇒ y–4+4=–7+4 [Adding 4 both sides]⇒ y=–3

(a) x–1=0 ⇒ x–1+1=0+1 [Adding 1 both sides]⇒ x=1(b) x+1=0 ⇒ x+1–1=0–1 [Subtracting 1 both sides]⇒ x=–1(c) x–1=5 ⇒ x–1+1=5+1 [Adding 1 both sides]⇒ x=6(d) x+6=2 ⇒ x+6–6=2–6 [Subtracting 6 both sides]⇒ x=–4(e) y–4=–7 ⇒ y–4+4=–7+4 [Adding 4 both sides]⇒ y=–3(f) y–4=4 ⇒ y–4+4=4+4 [Adding 4 both sides]

(a) x–1=0 ⇒ x–1+1=0+1 [Adding 1 both sides]⇒ x=1(b) x+1=0 ⇒ x+1–1=0–1 [Subtracting 1 both sides]⇒ x=–1(c) x–1=5 ⇒ x–1+1=5+1 [Adding 1 both sides]⇒ x=6(d) x+6=2 ⇒ x+6–6=2–6 [Subtracting 6 both sides]⇒ x=–4(e) y–4=–7 ⇒ y–4+4=–7+4 [Adding 4 both sides]⇒ y=–3(f) y–4=4 ⇒ y–4+4=4+4 [Adding 4 both sides]⇒ y=8

(a) x–1=0 ⇒ x–1+1=0+1 [Adding 1 both sides]⇒ x=1(b) x+1=0 ⇒ x+1–1=0–1 [Subtracting 1 both sides]⇒ x=–1(c) x–1=5 ⇒ x–1+1=5+1 [Adding 1 both sides]⇒ x=6(d) x+6=2 ⇒ x+6–6=2–6 [Subtracting 6 both sides]⇒ x=–4(e) y–4=–7 ⇒ y–4+4=–7+4 [Adding 4 both sides]⇒ y=–3(f) y–4=4 ⇒ y–4+4=4+4 [Adding 4 both sides]⇒ y=8(g) y+4=4 ⇒ y+4–4=4–4 [Subtracting 4 both sides]

(a) x–1=0 ⇒ x–1+1=0+1 [Adding 1 both sides]⇒ x=1(b) x+1=0 ⇒ x+1–1=0–1 [Subtracting 1 both sides]⇒ x=–1(c) x–1=5 ⇒ x–1+1=5+1 [Adding 1 both sides]⇒ x=6(d) x+6=2 ⇒ x+6–6=2–6 [Subtracting 6 both sides]⇒ x=–4(e) y–4=–7 ⇒ y–4+4=–7+4 [Adding 4 both sides]⇒ y=–3(f) y–4=4 ⇒ y–4+4=4+4 [Adding 4 both sides]⇒ y=8(g) y+4=4 ⇒ y+4–4=4–4 [Subtracting 4 both sides]⇒ y=0

(a) x–1=0 ⇒ x–1+1=0+1 [Adding 1 both sides]⇒ x=1(b) x+1=0 ⇒ x+1–1=0–1 [Subtracting 1 both sides]⇒ x=–1(c) x–1=5 ⇒ x–1+1=5+1 [Adding 1 both sides]⇒ x=6(d) x+6=2 ⇒ x+6–6=2–6 [Subtracting 6 both sides]⇒ x=–4(e) y–4=–7 ⇒ y–4+4=–7+4 [Adding 4 both sides]⇒ y=–3(f) y–4=4 ⇒ y–4+4=4+4 [Adding 4 both sides]⇒ y=8(g) y+4=4 ⇒ y+4–4=4–4 [Subtracting 4 both sides]⇒ y=0(h) y+4=–4 ⇒ y+4–4=–4–4 [Subtracting 4 both sides]

(a) x–1=0 ⇒ x–1+1=0+1 [Adding 1 both sides]⇒ x=1(b) x+1=0 ⇒ x+1–1=0–1 [Subtracting 1 both sides]⇒ x=–1(c) x–1=5 ⇒ x–1+1=5+1 [Adding 1 both sides]⇒ x=6(d) x+6=2 ⇒ x+6–6=2–6 [Subtracting 6 both sides]⇒ x=–4(e) y–4=–7 ⇒ y–4+4=–7+4 [Adding 4 both sides]⇒ y=–3(f) y–4=4 ⇒ y–4+4=4+4 [Adding 4 both sides]⇒ y=8(g) y+4=4 ⇒ y+4–4=4–4 [Subtracting 4 both sides]⇒ y=0(h) y+4=–4 ⇒ y+4–4=–4–4 [Subtracting 4 both sides]⇒ y=–8