5x-2y=3 x+6y=7
1个回答
两式组成方程组
解这个方程组得
x=1
y=1
相关问题
3x+5y-(x+y)=6 2(x+y)-3x=-7
2x-3y-2=0 5x+3y=18 2x-3y=7 (2x-3y+5)/7+2y=9 2x-3y=3 6x+5y=35
- {5x-2y=3{x+6y=7- {x+2y=0{3x+4y-6=0- {x-y=5{2x=15-3y- {3x-2
1、(2x+3y)(3x-5y)-(x+y)(6x-7y)
送分的5x+y=7,3x-y=1 4x-3y=5,4x+6y=14 6x+7y=5,6x-7y=190.5x-3y=-1
(1)7x+3y=18 2x+3y=13 (2)5x+2y=7 2x+y=1 (3)3x+4y=5 4x+5y=6如题
求解(1){2x-y=9 3x+y=7 (2){4x-3y=5.6 5x+3y=7.4 (3){2x+3y+19=0 x
3x-5y=-9 2x+7y=-6
解方程(1) {5x+2y=2 7x-5y=34 (2){8x+3y+2=0,6x+5y+7=0 (3){x+1/3-y
8y-(8-5y)=3y+2(4y+7) 8-3y=6-x 4x-3(20-x)=5x-7(20-