(X+3)+(2y)=90

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Solution for (X+3)+(2y)=90 equation: 



(X+3)+(2X)=90

We move all terms to the left:

(X+3)+(2X)-(90)=0

We add all the numbers together, and all the variables

2X+(X+3)-90=0

We get rid of parentheses

2X+X+3-90=0

We add all the numbers together, and all the variables

3X-87=0

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

3X=87

X=87/3

X=29

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