X+7+y=128

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Solution for X+7+y=128 equation: 



X+7+X=128

We move all terms to the left:

X+7+X-(128)=0

We add all the numbers together, and all the variables

2X-121=0

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

2X=121

X=121/2

X=60+1/2

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