Question

1) (8х + 3) - (10х+6) = 9
2) 2,8 - х = 8 (х+2,8)
3) 0,3 (6-3y) = 4?5 - 0,8 (y-9)
4) 5/6 (1/2х - 2/3) = 3х - 2 1/4

Answer 1

1)8х+3-10х-6=9;
-2х=12;
х=-6.
2)2,8-х=8х+2,8;
7х=0;
х=0.
3)1,8-0,9у=4,5-0,8у+7,2;
-0,1у=9,9;
у=99.