6-2.5x=21

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Solution for 6-2.5x=21 equation: 



6-2.5x=21

We move all terms to the left:

6-2.5x-(21)=0

We add all the numbers together, and all the variables

-2.5x-15=0

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

-2.5x=15

x=15/-2.5

x=-6

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