7x-7+6x+4=90

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Solution for 7x-7+6x+4=90 equation: 



7x-7+6x+4=90

We move all terms to the left:

7x-7+6x+4-(90)=0

We add all the numbers together, and all the variables

13x-93=0

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

13x=93

x=93/13

x=7+2/13

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