(20+x)7=112

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Solution for (20+x)7=112 equation: 



(20+x)7=112

We move all terms to the left:

(20+x)7-(112)=0

We add all the numbers together, and all the variables

(x+20)7-112=0

We multiply parentheses

7x+140-112=0

We add all the numbers together, and all the variables

7x+28=0

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

7x=-28

x=-28/7

x=-4

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