(X)+(2x)+(x+3)=75

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Solution for (X)+(2x)+(x+3)=75 equation: 



(X)+(2X)+(X+3)=75

We move all terms to the left:

(X)+(2X)+(X+3)-(75)=0

We add all the numbers together, and all the variables

3X+(X+3)-75=0

We get rid of parentheses

3X+X+3-75=0

We add all the numbers together, and all the variables

4X-72=0

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

4X=72

X=72/4

X=18

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