2(5-3х)=7х+3 10(х-9)=7 3(5х-3)=-11х+17
2(5-3х)=7х+3
10-6х=7х+3
-6х-7х=3-10
-13х=-7
х=7/13
10(х-9)=7
10х-90=7
10х=7+90
10х=97
х=97/10
3(5х-3)=-11х+17
15х-9=-11х+17
15х+11х=17+9
26х=26
х=1
Ответ:
1)
2)
3)