Решите уравнение: 1) 9b+6b-15=615 2)2a+123a+97=472 3)17x-x+5x-19=170 4)17y-y-22y+40=190

1)9b+6b-15=615
15b=615+15
15b=630
b=630:15
b=42
2)2a+123a+97=472
125a=472-97
125a=375
a=375:125
a=3
3)17x-x+5x-19=170
21x=170+19
21x=189
x=189:21
x=9
4)17y-y-22y+40=190
-6y=190-40
-6y=150
y=150:(-6)
y=-25

1) 9b+6b-15=615

9b+6b=615+15

15b=630

b=630/15

b=42

2) 2a+123a+97=472

125a=472-97

125a=375

a=375/125

a=3

3)17x-x+5x-19=170

21x=170+19

21x=189

x=189/21

x=9

4)17y-y-22y+40=190

-6y=190-40

-6y=150

y=150/(-6)

y=-25