7x+20x=30

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Solution for 7x+20x=30 equation: 



7x+20x=30

We move all terms to the left:

7x+20x-(30)=0

We add all the numbers together, and all the variables

27x-30=0

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

27x=30

x=30/27

x=1+1/9

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