18+2x=30

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Solution for 18+2x=30 equation: 



18+2x=30

We move all terms to the left:

18+2x-(30)=0

We add all the numbers together, and all the variables

2x-12=0

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

2x=12

x=12/2

x=6

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