3x-2y=11 2x+3y=16
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3x-2y=11 2x+3y=16
3x-2y=11 2x+3y=16
3x-2y=11 2x+3y=16
3x-2y=11 (1)
2x+3y=16 (2)
(1)×3+(2)×2
9x+4x=33+32
13x=65
所以
x=5
y=(3x-11)/2=2
这个是一元二次方程,不是很好做吗?x=5,y=2
第一个式子乘以3,得9x-6Y=33,第二个式子乘以2,得4X+6Y=32,两个式子相加,13X=65,求出X,带入任意一个式子得出Y
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