7x+3.5=90,x

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Solution for 7x+3.5=90,x equation: 



7x+3.5=90.x

We move all terms to the left:

7x+3.5-(90.x)=0

We add all the numbers together, and all the variables

7x-(+90.x)+3.5=0

We get rid of parentheses

7x-90.x+3.5=0

We add all the numbers together, and all the variables

-83x+3.5=0

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

-83x=-3.5

x=-3.5/-83

x=2.3333333333333/55.333333333333

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