Question

3+4(5х-3)=4х+7;,3(5х-7)-7(4х+5)=х

Answer 1

3+4(5х-3)=4х+7
3+20х-12=4х+7
20х-4х=7+12-3
16х=16
х=1

3(5х-7)-7(4х+5)=х
15х-21-28х-35=х
15х-28х-х=21+35
-14х=56
-х=4
х=-4