2x+3-5x=21

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Solution for 2x+3-5x=21 equation: 



2x+3-5x=21

We move all terms to the left:

2x+3-5x-(21)=0

We add all the numbers together, and all the variables

-3x-18=0

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

-3x=18

x=18/-3

x=-6

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