Verified answer

1)15х=0.15

х=0.15:15

х=0.01

ПРОВЕРКА:15*0.01=0.15, 0.15=0.15.

2)3.08:у=4

у=3.08:4

у=0.77

ПРОВЕРКА:3.08:0.77=4, 4=4.

3)3а+8а=1.87

11а=1.87

а=1.87:11

а=0.17

ПРОВЕРКА:3*0.17+8*0.17=1.87, 0.51+1.36=1.87, 1.87=1.87.

4)7z-3z=5.12

4z=5.12

z=5.12:4

z=1.28.

ПРОВЕРКА:7*1.28-3*1.28=5.12, 8.96-3.84=5.12, 5.12=5.12. 

Verified answer

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