21x+120=51x

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Solution for 21x+120=51x equation: 



21x+120=51x

We move all terms to the left:

21x+120-(51x)=0

We add all the numbers together, and all the variables

-30x+120=0

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

-30x=-120

x=-120/-30

x=+4

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