解方程:3-1/5(5-2y)=4-1/10(4-7y)+1/2(y+2)

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解方程:3-1/5(5-2y)=4-1/10(4-7y)+1/2(y+2)解方程:3-1/5(5-2y)=4-1/10(4-7y)+1/2(y+2)解方程:3-1/5(5-2y)=4-1/10(4-7

解方程:3-1/5(5-2y)=4-1/10(4-7y)+1/2(y+2)
解方程:3-1/5(5-2y)=4-1/10(4-7y)+1/2(y+2)

解方程:3-1/5(5-2y)=4-1/10(4-7y)+1/2(y+2)
3-1/5(5-2y)=4-1/10(4-7y)+1/2(y+2)
两边同×10,
30-2(5-2y)=40-(4-7y)+5(y+2)
20+4y=46+12y
8y=-26
y=-3.25