2x+5(100-x)=266怎么解,

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2x+5(100-x)=266怎么解,
2x+5(100-x)=266怎么解,

2x+5(100-x)=266怎么解,
2x+5(100-x)=266
2x+500-5x=266
-3x=266-500
-3x=-234
3x=234
x=78