(2.5x+x)7=30

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Solution for (2.5x+x)7=30 equation: 



(2.5x+x)7=30

We move all terms to the left:

(2.5x+x)7-(30)=0

We add all the numbers together, and all the variables

(+3.5x)7-30=0

We multiply parentheses

21x-30=0

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

21x=30

x=30/21

x=1+3/7

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