7x+9x=90

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Solution for 7x+9x=90 equation: 



7x+9x=90

We move all terms to the left:

7x+9x-(90)=0

We add all the numbers together, and all the variables

16x-90=0

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

16x=90

x=90/16

x=5+5/8

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