What is the solution set of the following equation?
-8x+x+15=-7x+12

a) Ø
b) {1/7}
c) {all reals}

Question

What is the solution set of the following equation?
-8x+x+15=-7x+12

a) Ø
b) {1/7}
c) {all reals}

anonymous · Answer

option c) {all reals}

anonymous · Answer

-8x + x + 15 = -7x + 12
-7x + 15 = -7x + 12
-7x + 7x = 12 - 15
0 = -3 (incorrect)
This equation has no solution

anonymous · Answer

Thank you, could you explain how you g the answer please? I have no idea how to do these problems.

anonymous · Answer

ya @kelliegirl33  you are right...I am sorry

anonymous · Answer

-8x + x + 15 = -7x + 12 -- start by combining like terms
-7x + 15 = -7x + 12 -- add 7x to both sides
-7x + 7x + 15 = -7x + 7x + 12
15 = 12 (not true)
if you get an answer that is not true, then there is no solution

anonymous · Answer

Thank you!