Solve. 25 - 4x = 15 - 3x + 10 - x

25 - 4x = 15 - 3x + 10 - x combine x terms on the left side:

25 - 4x + 3x + x = 15 + 10 - 25 and constants on the right side

25 = 10 this can never be true, so there is no solution. Ensure that you have copied down this problem correctly.

-4x=15-3x+10-x

-4x-3x=-7x

-7x=15+10-x

-7x=25-x

-8x=25