1)15х+34=9-11х
15х+11х=9-34
26х=-25
Х=-25/26
2)(9у+5)-(5у+17)=56
9у+5-5у-17=56
9у-5у=56+17+5
4у=68
У=17
3)(34х+17)(25-7х)=0
34х+17=0
34х=-17
Х=-1/2=-0,5
25-7х=0
-7х=-25
Х=25/7=3 4/7
1)15х+34=9-11х
15х+11х=9-34
26х=-25
Х=-25/26
2)(9у+5)-(5у+17)=56
9у+5-5у-17=56
9у-5у=56+17+5
4у=68
У=17
3)(34х+17)(25-7х)=0
34х+17=0
34х=-17
Х=-1/2=-0,5
25-7х=0
-7х=-25
Х=25/7=3 4/7