Question

2. Solve and check the following equations:
a. 21 = −7n
b. m/ 4 = −13
c. −126 = 14k
d. −143 = −11x
e. −16 + x = −15
f. −5 = a /18
g. −17 = x − 15
h. n − 8 = −10
i. 7+ x= 40
j. 6x= 24
k. 7+x= 30
l. y-5=40

Answer 1

Answer:

a. 21 = -7n

21/-7 = n

n = -3 ans.

verify -

21 = -7 × -3

21 = 21 Hence verified.

b. m/4 = - 13

m = -13 × 4

m = -52 ans.

verify -

-52/4 = -13

-13 = -13 hence verified.

c. -126 = 14k

k = -126/14

k = -9 ans.

verify -

-126 = 14k

-126 = 14 × -9

-126 = - 126 hence verified.

d. - 143 = -11x

x = -143 / -11

x = 13ans.

verify-

-143 = -11 × 13

-143 = -143 hence verified.

e. -16 + x = -15

-16 + 15 = -x

-1 = -x

x = 1 ans.

verify -

-16 + 1 = -15

-15 = -15 hence verified.

f. -5 = a/18

-5 × 18 = a

-90 = a

a = -90

verify -

-5 = -90/18

-5 = -5 hence verified.

g. -17 = x - 15

-17 + 15 = x

-2 = x

x = -2 ans.

verify -

-17 = -2-15

-17 = -17 hence verified.

h. n - 8 = -10

n = -10 + 8

n = -2 ans.

verify -

-2-8 = -10

-10 = -10 hence verified.

i. 7 + x = 40

x = 40 - 7

x = 33 ans.

verify -

7 + 33 = 40

40 = 40 hence verified.

j. 6x = 24

x = 24/6

x = 4 ans.

verify -

6 × 4 = 24

24 = 24 hence verified.

k. 7 + x = 30

x = 30 - 7

x = 23 ans.

verify -

7 + 23 = 30

30 = 30 hence verified.

l. y - 5 = 40

y = 40 + 5

y = 45 ans.

verify -

45 - 5 = 40

40 = 40 hence verified.

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