28=7-7x

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Solution for 28=7-7x equation:



28=7-7x
We move all terms to the left:
28-(7-7x)=0
We add all the numbers together, and all the variables
-(-7x+7)+28=0
We get rid of parentheses
7x-7+28=0
We add all the numbers together, and all the variables
7x+21=0
We move all terms containing x to the left, all other terms to the right
7x=-21
x=-21/7
x=-3

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