Question

помогите пожайлуст.......

Answer 1

№4
2(х+у)-х=-6
3х-(х-у)=0

2х+2у-х=-6
3х-х+у=0

х+2у=-6
2х-у=0

х=-6-2у
2(-6-2у)=-6
-12+4у+6=0
4у=6
у=64=1,5
х=-6-2*1.5=-6-3=-9

х+5у=-21
0.5х-у=6

у=0.5х-6
х+5(0.5х-6)=-21
х+2.5х=-21+30
3.5х=9
х=187=2 47
у=0.5*2 47-6=1 27-6=-4 56