8X-8Y-3X+3Y=-12和6X+6Y-8X-4Y=16.二元一次方程,
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8X-8Y-3X+3Y=-12和6X+6Y-8X-4Y=16.二元一次方程,
8X-8Y-3X+3Y=-12和6X+6Y-8X-4Y=16.二元一次方程,
8X-8Y-3X+3Y=-12和6X+6Y-8X-4Y=16.二元一次方程,
先合并同离项,得
5x-5y=-12,@
-2x+2y=16 &
即-x+y=8 把 y=8+x把它代入方程@
15x-5(8+x)=-12
x=2.8 y=10.8
方程1 15x-5y=-12 方程2 -2x+2y=16即-x+y=8 y=8+x把它代入方程1
15x-5(8+x)=-12
x=2.8
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=
8x-8y-3x-3y=-12,6x+6y-8x+4y=16
填空题 x+y/4=x-y/6=3x+12y+5/8 x= y=
8(x-y)=3(x+y)-12 6(x+y)=4(2x-y)+16
8(x-y)=3(x+y)-12 6(x+y)=4(2x-y)+16
[2(x-y)^5-8(x-y)^2(x+y)+6y(x-y)^2]÷2(x-y)^2[2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2]÷2(x-y)^2
8X-8Y-3X+3Y=-12和6X+6Y-8X-4Y=16.二元一次方程,
8X-8Y-3X+3Y=-12和6X+6Y-8X-4Y=16.帮我解一下好吗?谢谢
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