0.7分之2m-1+7分之1=0.3分之m 3分之y+12分之6-y=2-3分之2y

题目

0.7分之2m-1+7分之1=0.3分之m 3分之y+12分之6-y=2-3分之2y

答案

0.7分之2m-1+7分之1=0.3分之m
(2m-1)/0.7+1/7=m/0.3
(20m-10)/7+1/7=10m/3
3(20m-10)+3=70m
60m-30+3=70m
60m-70m=27
10m=27
m=27/10
3分之y+12分之6-y=2-3分之2y
y/3+(6-y)/12=2-2y/3
4y+6-y=24-8y
3y+8y=24-6
11y=18
y=18/11