Question

упростить.
1) 6+4a-5a+a-7a
2)5(x-2)-6(x+3)-3(2x-9)

Answer 1

1)6-7а
2)5х-10-6х-18-6х+27=-7х-1

Answer 2

1) 6+4a-5a+a-7a=6-7a
2) 5(x-2)-6(x+3)-3(2x-9)=5x-10-6x-18-5x+27=5x-6x-5x-10-18+27=-6x-1