解方程组555553x+2y=6 ①5x-2y=64 ②3x+4y=11 ①4x-5y=-37 ②
解方程组 {3(x+y)-4(x-y)=11 {2(x-y)+5(x+y)=27全过程、快
解方程组 {3(x+y)-4(x-y)=11 {2(x-y)+5(x+y)=27
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
解方程组(x/2-y/5=4①,x/7-y/15=3②)
3(x+y)+2(x-y)=36 4(x+y)-5(x-y)=2 解方程组
解方程组:{二分之x+y+二分之x-y=6,4(x+y)-5(x-y)=2()
x+y/2+x-y/3=6,4(x+y)-5(x-y)=2用加减消元法解方程组
y-3x=2,y-5x=4,y-7x=6,y-9x=8,y-11x=0方程组,
方程组 5x+2y=25① 3x+4y=15②
解方程组(x+y)/4-(2x-y)/3=-1 ① 6(x+y)-4(2x-y)=16 ②