1. 5х+(7у-х)-(3х+7у)2. 1+(0,5х -3)-(1,5х-4)

Question

1. 5х+(7у-х)-(3х+7у)
2. 1+(0,5х -3)-(1,5х-4)

Answer 1

1). 5х+(7у-х)-(3х+7у)=5x+7y-x-3x-7y=x
2). 1+(0,5х -3)-(1,5х-4) =1+0,5x -3 -1,5x+4=2-x