(3x+45)+3x+(4x-15)=180

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Solution for (3x+45)+3x+(4x-15)=180 equation: 



(3x+45)+3x+(4x-15)=180

We move all terms to the left:

(3x+45)+3x+(4x-15)-(180)=0

We add all the numbers together, and all the variables

3x+(3x+45)+(4x-15)-180=0

We get rid of parentheses

3x+3x+4x+45-15-180=0

We add all the numbers together, and all the variables

10x-150=0

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

10x=150

x=150/10

x=15

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