Question

Реши уравнения
1)2(5-2x)+3(7x-3)=35
2)6(3x+4)-2(-3+5x)=70
3)-6(1-3x)+3(x-4)=45

Answer 1

1) 10-4x+21x-9=35
1+17x=35
17x=34
x=34:17
x=2
2) 18x+24+6-10x=70
8x+30=70
8x=40
x=40:8
x=5