Question

Hat is the solution set of the following equation? -8x + x + 15 = -7x + 12 Ø {} {all reals}

Answer 1

-8x + x + 15 = -7x + 12
-7x + 15 = -7x + 12

First of all, we need to put the variables apart and the numbers apart. So we add 7x on both sides:
-7x + 7x + 15 = -7x + 7x + 12
0x + 15 = 0x + 12
15 = 12

This answer is impossible since 15 can never be equal to 12. So there are no values of x that can make the equation true.

Hope this helps! :)