0.84x+4.2=21

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Solution for 0.84x+4.2=21 equation: 



0.84x+4.2=21

We move all terms to the left:

0.84x+4.2-(21)=0

We add all the numbers together, and all the variables

0.84x-16.8=0

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

0.84x=16.8

x=16.8/0.84

x=20

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