2x+5x-4=21x

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Solution for 2x+5x-4=21x equation: 



2x+5x-4=21x

We move all terms to the left:

2x+5x-4-(21x)=0

We add all the numbers together, and all the variables

-14x-4=0

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

-14x=4

x=4/-14

x=-2/7

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