5(X+Y)=330 (X-Y)*33=330解方程

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5(X+Y)=330(X-Y)*33=330解方程5(X+Y)=330(X-Y)*33=330解方程5(X+Y)=330(X-Y)*33=330解方程5（x+y)=330所以,x+y=66而,x-y=

5(X+Y)=330 (X-Y)*33=330解方程
5(X+Y)=330 (X-Y)*33=330解方程

5(X+Y)=330 (X-Y)*33=330解方程
5（x+y)=330
所以,x+y=66
而,x-y=330/33=10
上面两式相加,得到
2x=76
所以,x=38,那么y=66-x=28

5(X+Y)=330
x+y=66
(X-Y)*33=330
x-y=10
x=38,y=28

Y=28 x=38

第一个方程x+y=66
第二个方程x-y=10
联立两方程得x=38,y=28

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