Question

1)-3(3y+4)+4(2y-1)=0
2)4(1,2b+3,7)-2,8=5,2b
3)4(0,2x-7)-5(0,3x+6)=5

Answer 1

1) -9у-12+8у-4=0
-9у+8у=4+12
-у=16; у=-16;

2) 4,8б+14,8-2,8=5,2б
4,8б-5,2б=-14,8+2,8
-0,4б=-12;
б=30;

3) 0,8х-28-1,5х-30=5
0,8х-1,5х=5+28+30
-0,7х=63; х=-90