Question

solve the following equations and verify the solution 18q - 3 + 15 + 9y

Answer 1

Answer:

  x+7=9

2.4x=25

3.9y=−135

4.15−x=4

5.3(x−3)=15

6.7y+3=9

Answer 2

Answer:

ANSWER

(i) x+7=9 ……..(1)

x=9−7=2

Using equation (1) [x=2]

Check ⇒2+7=9 (Proved).

(ii)

4

x

=25 ……..(1)

x=4×25=100

Check:

4

200

=25 (Proved).

(iii) 4y=−135 ………(1)

y=−

9

135

=−15

Check =9×(−15)=−135 (Proved).

(iv) 15−x=4 ……….(1)

x=15−4=11

Check 15−11=4 (Proved)

(v) 3(x−3)=15 ………..(1)

3x−9=15

3x=9+5

3x=24

x=24=8

Check: 3(8−3)=3(5)=15 (Proved).

(vi) 7y+3=9

7y=4−3

7y=6

y=

7

6

Check 7×

7

6

+3=9 (Proved).

solution