1.2x+1.3y=14 2.3x-0.7y=1
2个回答
1.2x+1.3y - (2.3x-0.7y)=13
2y-1.1x= 13
y=(13+1.1x)/2
y=6.5+0.55x
代入 计算.如果题目没错的话,就可以算出具体的X和Y值了.
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