7x-3x-18=30

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Solution for 7x-3x-18=30 equation: 



7x-3x-18=30

We move all terms to the left:

7x-3x-18-(30)=0

We add all the numbers together, and all the variables

4x-48=0

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

4x=48

x=48/4

x=12

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