.30x+x=690

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Solution for .30x+x=690 equation: 



.30x+x=690

We move all terms to the left:

.30x+x-(690)=0

We add all the numbers together, and all the variables

1.3x-690=0

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

1.3x=690

x=690/1.3

x=530+1/1.3

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