(5y+4)/3+(y-1)/4=2-(5y-5)/12解方程
问题描述:
(5y+4)/3+(y-1)/4=2-(5y-5)/12解方程
我算y等于8/7,正确的是多少?
答
两边同时乘以12得:
4(5y+4)+3(y-1)=24-(5y-5)
20y+16+3y-3=24-5y+5
28y=16
y=16/28=4/7两边同时乘以12得:4(5y+4)+3(y-1)=24-(5y-5)20y+16+3y-3=24-5y+5以上几步和亲相同,可是后面我算28y=32,y=8/7.20y+16+3y-3=24-5y+520y+3y+5y=24+5-16+328y=32-1628y=16