0.3x=21+0.2x

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Solution for 0.3x=21+0.2x equation: 



0.3x=21+0.2x

We move all terms to the left:

0.3x-(21+0.2x)=0

We add all the numbers together, and all the variables

0.3x-(0.2x+21)=0

We get rid of parentheses

0.3x-0.2x-21=0

We add all the numbers together, and all the variables

0.1x-21=0

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

0.1x=21

x=21/0.1

x=210

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