Question

-5(a+b)+2(2a-b)+4a-7​

Answer 1

Answer:

-5(a+b)+2(2a-b)+4a-7=0

-5a-5b+4a-2b+4a-7=0

-5a-7b-7=0

-5a-7(b+1)=0

-5a=7(b+1)

a=-7(b+1)/5

Answer 2

Solution:-

-5(a+b)+2(2a-b)+4a-7

-5a-5b+4a-2b+4a-7

-5a+4a+4a-5b-2b-7

-5a+8a-7b-7

3a-7b-7

3a-7(b+1)

NOTE

opposite sign = subtraction

same sign = addition