X+(.7)x=90

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Solution for X+(.7)x=90 equation: 



X+(.7)X=90

We move all terms to the left:

X+(.7)X-(90)=0

We add all the numbers together, and all the variables

X+(0.7)X-90=0

We multiply parentheses

X+0.7X-90=0

We add all the numbers together, and all the variables

1.7X-90=0

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

1.7X=90

X=90/1.7

X=52+1/1.0625

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