5x+2x+7=30

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Solution for 5x+2x+7=30 equation: 



5x+2x+7=30

We move all terms to the left:

5x+2x+7-(30)=0

We add all the numbers together, and all the variables

7x-23=0

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

7x=23

x=23/7

x=3+2/7

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