Question

3(4a+b)-2(3a+2b). 4,5(-8y-7)-3,9(6-9y)

Answer 1

3(4a+b)-2(3a+2b)=12a+3b-6a-4b=6a-b
4,5(-8y-7)-3,9(6-9y)=-36y-31,5-23,4+35,1y=0,9y-54,9