x+1.3x=90

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Solution for x+1.3x=90 equation: 



x+1.3x=90

We move all terms to the left:

x+1.3x-(90)=0

We add all the numbers together, and all the variables

2.3x-90=0

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

2.3x=90

x=90/2.3

x=39+0.3/2.3

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