90+20+7x+7=180

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Solution for 90+20+7x+7=180 equation: 



90+20+7x+7=180

We move all terms to the left:

90+20+7x+7-(180)=0

We add all the numbers together, and all the variables

7x-63=0

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

7x=63

x=63/7

x=9

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