0,36-1=-0,64

0,5х-0,16+1,5х=2х-0,16

0,4х+3-7+0,1х=0,5х-4

1/3х-(6х-2)/3+5= 1-6х²-2х+15х   = -6х²+13х+1

                                 3х                            3х

-2(-3,5х-4,8)+8х=7х+9,6+8х=15х+9,6

-17(х-у)+3(х+у)=-17х+17у+3х+3у=-14х+20у