Simplify each expression

(-0.75x+6) - (2.5x-1.9)

8 (5x-3y)

Factor each expression

4x+20

6x+54

For (-0.75+6) - (2.5x-9) all you have to do is multiply the negative into the 2nd brackets and collect like terms. Same with 8 (5x-3y) all u have to do is multiply in the 8.

for the 4x+20 and 6x+54 all u do is factor out a common number (LCD - lowest common denominator)