解方程组{5x+2y=6 ① 2x+5y=8 ②
解方程组{5x+2y=6 ① 2x+5y=8 ②
解方程组(x+y)(x-2y)=-5 (x-y)(x+2y)=7
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:{二分之x+y+二分之x-y=6,4(x+y)-5(x-y)=2()
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/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)
解方程组6/x-7/y=40和2/x-5/y=8
8X+3Y+2=0 6X+5Y+7=0 解方程组
解方程组{3x+2y=8 5x-4y=6 加减消元法.
用加减法解方程组:8x+3y+2=0,6x+5y+7=0;(方程组)