100+.3x=30+.8x

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Solution for 100+.3x=30+.8x equation: 



100+.3x=30+.8x

We move all terms to the left:

100+.3x-(30+.8x)=0

We add all the numbers together, and all the variables

.3x-(.8x+30)+100=0

We get rid of parentheses

.3x-.8x-30+100=0

We add all the numbers together, and all the variables

-0.5x+70=0

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

-0.5x=-70

x=-70/-0.5

x=+140

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