解方程:y-2/5 -y+3/10-2y-5/3+3=0
问题描述:
解方程:y-2/5 -y+3/10-2y-5/3+3=0
答
6y-12-3y-9-20y+50+90=0
-17y=-119
y=7写详细点,不懂,我是初学者去分母,得 6(y-2)-3(y+3)-10(2y-5)+90=0去括号,得6y-12-3y-9-20y+50+90=0移项合并同类项,得 -17y=-119系数化1得 y=7