Question

1) (х+3)1,2=1,2х+3,6
2)-1/5 (20-5х)=-4+5х
3)3(х-6)-7(3х-5)= -18х+17
4)0,9х(4-7а)=3,6х+6,3а
5)-2(8-а)-3(а+7)=
6)х-(1-х)+(8-4х)=
7)х:(-1 2/3)=3
8)3(9х-1)=4(5х+3)
9)х=1/2