3x+5y=8,4x+2y=-7解方程组

解方程组(x+y)(x-2y)=-5 (x-y)(x+2y)=7 3x+5y=8,4x+2y=-7解方程组 方程组x-2y=8,3x-4y=5,x=?,y=? y-3x=2,y-5x=4,y-7x=6,y-9x=8,y-11x=0方程组, 用代数式解方程组3x+y=8 3x-y=4 2x+5y=8 x-3y=-7 解方程组24/(x+y) +24/(x-y) = 7/3 ,8/(x+y) +18/(x-y) = 4/3 解二元一次方程组:{5(x+y)+3(x-y)=2{7(x+y)-3(x-y)=-6 解方程组 x-y/3-x+y/4=2 x-y/6-x+y/8=3 3(x+y)+2(x-y)=36 4(x+y)-5(x-y)=2 解方程组 解方程组 {(x+y)/2+(x-y)/3=6 5(x+y)-2(x-y)=4 解方程组 X+Y/2+X-Y/3=6 4[X+Y]-5[X-Y]=2 解方程组：x+y/2+x-y/3=6 4(x+y)-5(x-y)=12