7x+7+9x+3=90

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Solution for 7x+7+9x+3=90 equation: 



7x+7+9x+3=90

We move all terms to the left:

7x+7+9x+3-(90)=0

We add all the numbers together, and all the variables

16x-80=0

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

16x=80

x=80/16

x=5

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