Question

I WILL MEDAL
Select ALL equations that have no solution.

A.)6x - 2 - 3x = 3x - 2

B.)6x - (3x + 8) = 16x

C.)10 + 6x = 15 + 9x - 3x

D.)11 + 3x - 7 = 6x + 5 - 3x

Answer 1

No solutions means that the values of x in both sides of the equal sign don't match with each other.

For example:
2x + 3 = 2x + 5
2x - 2x + 3 = 2x - 2x + 5
3 = 5 <--- that's not true

Answer 2

Just solve for the x's in both sides of the equal sign for each equation. Whichever ones have x's that don't match, then you know that there is no solution.