4X+5y=100=X+Y=440

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Solution for 4X+5y=100=X+Y=440 equation: 



4X+5X=100=X+=440

We move all terms to the left:

4X+5X-(100)=0

We add all the numbers together, and all the variables

9X-100=0

We move all terms containing X to the left, all other terms to the right

9X=100

X=100/9

X=11+1/9

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