7x+45=4x+135

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Solution for 7x+45=4x+135 equation: 



7x+45=4x+135

We move all terms to the left:

7x+45-(4x+135)=0

We get rid of parentheses

7x-4x-135+45=0

We add all the numbers together, and all the variables

3x-90=0

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

3x=90

x=90/3

x=30

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