Question

solve the following equation and check the result in each case
3x-3=12​

Answer 1

3x-3=12

3x=12+3

x=15/3

x=5

Verification :

3(5)-3=12

15-3=12

12=12

Hence, x=3 is the solution and proved !

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Answer 2

Answer:

3x-3=12

3x=12+3

3x=15

x=15/3

x=5

Checking result:

3x-3=12

3(5)-3=12

15-3=12

12=12

LHS=RHS

Hence proved.