100+0.70x=30+0.90x

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Solution for 100+0.70x=30+0.90x equation: 



100+0.70x=30+0.90x

We move all terms to the left:

100+0.70x-(30+0.90x)=0

We add all the numbers together, and all the variables

0.70x-(0.90x+30)+100=0

We get rid of parentheses

0.70x-0.90x-30+100=0

We add all the numbers together, and all the variables

-0.2x+70=0

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

-0.2x=-70

x=-70/-0.2

x=+350

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