1/2(y-3)+3(y+2)=1 x等于多少?
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1/2(y-3)+3(y+2)=1 x等于多少?
1/2(y-3)+3(y+2)=1 x等于多少?
1/2(y-3)+3(y+2)=1 x等于多少?
1/2(y-3)+3(y+2)=1,1/2y-3/2+3y+6=1,2y-3+6y+12=2,8y+9=2,8y=9-2,8y=7,y=8/7.
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