解方程组(x/2-y/5=4①,x/7-y/15=3②)

解方程组(x/2-y/5=4①,x/7-y/15=3②) 1.解方程组 2x+6y=3① 3x+15y+2z=5② 4x-9y+4z=7③ 2.求方程组5x+3y=-16①6x- 方程组 5x+2y=25① 3x+4y=15② 解方程组；x/2-y/5=4；x/7-y/15=3 解方程组(x+y)(x-2y)=-5 (x-y)(x+2y)=7 解方程组:①3x-7y=1,5x-4y=17②23x+17y=63,17x+23y=57 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 10（x-y)=3(x+y)+15 6(x+y)=4(2x-y)+16 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