Question

What is 12x+15=12x-15

Answer 1

Subtract 15 from both sides of the equation
12+15=12−15
12+15−15=12−15−15
2 Simplify
Subtract the numbers
12=12−30
Subtract ( im lazy to type the whole thing)
Simplify
Combine like terms
0=−30
Result 0=−30

Answer 2

Hope this one help,, just saw this

Explanation:

This equation is invalid, the left and right sides are not equal, therefore there is no solution.