21x=-14x-28

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Solution for 21x=-14x-28 equation: 



21x=-14x-28

We move all terms to the left:

21x-(-14x-28)=0

We get rid of parentheses

21x+14x+28=0

We add all the numbers together, and all the variables

35x+28=0

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

35x=-28

x=-28/35

x=-4/5

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