7x+12-4x=30

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Solution for 7x+12-4x=30 equation: 



7x+12-4x=30

We move all terms to the left:

7x+12-4x-(30)=0

We add all the numbers together, and all the variables

3x-18=0

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

3x=18

x=18/3

x=6

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