30=x+4.2

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Solution for 30=x+4.2 equation: 



30=x+4.2

We move all terms to the left:

30-(x+4.2)=0

We get rid of parentheses

-x-4.2+30=0

We add all the numbers together, and all the variables

-1x+25.8=0

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

-x=-25.8

x=-25.8/-1

x=25+0.8/1

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