解方程组Q口Q!{5/2x+1 + 2/3y-1 =3{3/2x+1 + 1/4-3y =-6/5
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解方程组Q口Q!{5/2x+1 + 2/3y-1 =3{3/2x+1 + 1/4-3y =-6/5
解方程组Q口Q!
{5/2x+1 + 2/3y-1 =3
{3/2x+1 + 1/4-3y =-6/5
解方程组Q口Q!{5/2x+1 + 2/3y-1 =3{3/2x+1 + 1/4-3y =-6/5
将第一式等号两边都乘以3,得 15/(2x+1) + 6/(3y-1) = 9
将第二式等号两边都乘以5,得 15/(2x+1) + 5/(4-3y) = -6
两式相减:6/(3y-1) - 5/(4-3y) =15
去分母:24-18y-15y+5=15(-9y²+15y-4)
135y²-258y+89=0
严重怀疑你题目抄错了~坑爹啊
上乘3下乘5相减得y的二次方程,解得y,回代解x