x+2y=1680 2x+y=2280

来源：学生作业帮编辑：作业帮分类：数学作业时间：2024/05/27 16:33:12

x+2y=1680 2x+y=2280
大哥大姐帮帮忙

解 x+2y=1680 方程1 2x+y=2280方程2
将方程1乘以2得2x＋4y＝3360方程3,将方程3减方程2 得3y＝1080,即y＝360.
将y＝360代入方程1 ,x＝960.即方程组的解x＝960,y＝360.

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