(3x+2y=268 2x+3y=212) x-y=56 x=56+y 3(56+y)+2y=268 168+5y=268 5y=100 y=20 3x+40=268 3x=228 x=76 用(3x+2y=268 2x+3y=212) x-y=56x=56+y3(56+y)+2y=268 168+5y=2685y=100 y=203x+40=2683x=228x=76 用一元一次方程怎么解
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![(3x+2y=268 2x+3y=212) x-y=56 x=56+y 3(56+y)+2y=268 168+5y=268 5y=100 y=20 3x+40=268 3x=228 x=76 用(3x+2y=268 2x+3y=212) x-y=56x=56+y3(56+y)+2y=268 168+5y=2685y=100 y=203x+40=2683x=228x=76 用一元一次方程怎么解](/uploads/image/z/74598-6-8.jpg?t=%283x%2B2y%3D268+2x%2B3y%3D212%29+x-y%3D56+x%3D56%2By+3%2856%2By%29%2B2y%3D268+168%2B5y%3D268+5y%3D100+y%3D20+3x%2B40%3D268+3x%3D228+x%3D76+%E7%94%A8%283x%2B2y%3D268+2x%2B3y%3D212%29+x-y%3D56x%3D56%2By3%2856%2By%29%2B2y%3D268+168%2B5y%3D2685y%3D100+y%3D203x%2B40%3D2683x%3D228x%3D76+%E7%94%A8%E4%B8%80%E5%85%83%E4%B8%80%E6%AC%A1%E6%96%B9%E7%A8%8B%E6%80%8E%E4%B9%88%E8%A7%A3)
(3x+2y=268 2x+3y=212) x-y=56 x=56+y 3(56+y)+2y=268 168+5y=268 5y=100 y=20 3x+40=268 3x=228 x=76 用(3x+2y=268 2x+3y=212) x-y=56x=56+y3(56+y)+2y=268 168+5y=2685y=100 y=203x+40=2683x=228x=76 用一元一次方程怎么解
(3x+2y=268 2x+3y=212) x-y=56 x=56+y 3(56+y)+2y=268 168+5y=268 5y=100 y=20 3x+40=268 3x=228 x=76 用
(3x+2y=268 2x+3y=212)
x-y=56
x=56+y
3(56+y)+2y=268
168+5y=268
5y=100
y=20
3x+40=268
3x=228
x=76 用一元一次方程怎么解
(3x+2y=268 2x+3y=212) x-y=56 x=56+y 3(56+y)+2y=268 168+5y=268 5y=100 y=20 3x+40=268 3x=228 x=76 用(3x+2y=268 2x+3y=212) x-y=56x=56+y3(56+y)+2y=268 168+5y=2685y=100 y=203x+40=2683x=228x=76 用一元一次方程怎么解
5(X+Y)=480
x+y=96
x-y=56
2x=152 x=76
2y=40 y=20
你就是用的一元的方法啊,还有就是方程一乘以2,方程二乘以3抵消,求y=20,再解x
把3x+2y=268化成y=134-3/2x代入2x+3y=212,再把x解出来,这就是化成一元一次方程求解
5(X+Y)=480
x+y=96
x-y=56
2x=152 x=76
2y=40 y=20