4x+3x=2x+45

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Solution for 4x+3x=2x+45 equation: 



4x+3x=2x+45

We move all terms to the left:

4x+3x-(2x+45)=0

We add all the numbers together, and all the variables

7x-(2x+45)=0

We get rid of parentheses

7x-2x-45=0

We add all the numbers together, and all the variables

5x-45=0

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

5x=45

x=45/5

x=9

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