69+7x=90

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Solution for 69+7x=90 equation: 



69+7x=90

We move all terms to the left:

69+7x-(90)=0

We add all the numbers together, and all the variables

7x-21=0

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

7x=21

x=21/7

x=3

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