-21=-4.2g

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Solution for -21=-4.2g equation: 



-21=-4.2g

We move all terms to the left:

-21-(-4.2g)=0

We get rid of parentheses

4.2g-21=0

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

4.2g=21

g=21/4.2

g=5

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