15b+b=4*3
16b=12
b=12/16
b=0.75
Ответ=0,75
2) 0,87m-0,66m=0
m=0
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15b+b=4*3
16b=12
b=12/16
b=0.75
Ответ=0,75
2) 0,87m-0,66m=0
m=0