(X+y)/2=87

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Solution for (X+y)/2=87 equation: 



(X+X)/2=87

We move all terms to the left:

(X+X)/2-(87)=0

We add all the numbers together, and all the variables

(+2X)/2-87=0

We multiply all the terms by the denominator


(+2X)-87*2=0

We add all the numbers together, and all the variables

(+2X)-174=0

We get rid of parentheses

2X-174=0

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

2X=174

X=174/2

X=87

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