30x=0.8y 40(x-1)=y+25
2个回答
150x=4y
40x=y+65
150x=4y (1)
160x=4y+260 (2)
(2)-(1):10x=260
x=26,y=975
相关问题
x²-10xy+25y²-6x+30y+8
1/x^2+1/y^2-6/x-8/y+25=0
怎摸算出来的x=32,y=40x=32,y=40x(1-25%)=y(1-40%)
因式分解 x²+6x+y²-8y+25=0
x/2=y/5 25%x+40%y=1.4
x²+y²-6x-8y+25=0,求y/x-x/y的值
解方程组 30[2(x+0.05)+(y+0.10)]=30, 30(3x+2y)=40.5
30x=7分之3y 40(x-1)=y+25 解二元一次方程组!
解方程x²+y²-6x+8y+25=0
解方程:x²+y²-6x+8y+25=0