a + (3a - 2b) - (4a - 3b)
-(4a-3b) Multiply the numbers on the inside by negative 1 and make sure to change the positive or negative signs
a + 3a - 2b - 4a + 3b
(a+3a) + (-2b+3b) -4a
(4a - 4a) + b
answer is b
If anyone can check my work on this, please do. I just want to be sure that it was correct.
I had a hard time with these too