90+45+3x=180

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Solution for 90+45+3x=180 equation: 



90+45+3x=180

We move all terms to the left:

90+45+3x-(180)=0

We add all the numbers together, and all the variables

3x-45=0

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

3x=45

x=45/3

x=15

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