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数学高手快进来

2025-04-04 04:50:58
推荐回答（3个）
回答1：

解:
把x=3,y=-2代入方程ax+by=12
3a-2b=12
把x=-2,y=2代入方程ax+by=12
-2a+2b=12

3a-2b=12---------(1)
-2a+2b=12--------(2)
(1)+(2)得:a=24
把a=24代入(1)得:72-2b=12
-2b=-60
b=30

a=24
b=30

回答2：

3a-2b=12
-2a+2b=12

a=24
b=30

回答3：

3a-2b=12
-2a+2b=12
2c-14=8
→a=24,b=30,c=11

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