Question

please answer fast...

Solve and check, whether your answer is correct or not

(a)3x-9=12
(b)8x=18-x
(c)5x -7=2x+8
(d)3(x-1)=8​

Answer 1

(a) 3x-9=12

3x=12+9

3x=21

x=21÷3

x=7

(b)

Answer 2

Answer:

LHS =RHS

Step-by-step explanation:

3x-9=12

3x=12+9

3x=21

x=21/3

x=7

verification

putting x=7 in the given equation

3x-9=12

3×7-9=12

21-9=12

12=12

LHS =RHS

hence x=7 is a solution of the given equation