30+5x=12+7x

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Solution for 30+5x=12+7x equation: 



30+5x=12+7x

We move all terms to the left:

30+5x-(12+7x)=0

We add all the numbers together, and all the variables

5x-(7x+12)+30=0

We get rid of parentheses

5x-7x-12+30=0

We add all the numbers together, and all the variables

-2x+18=0

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

-2x=-18

x=-18/-2

x=+9

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