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21.42=4g+3.86
We move all terms to the left:
21.42-(4g+3.86)=0
We get rid of parentheses
-4g-3.86+21.42=0
We add all the numbers together, and all the variables
-4g+17.56=0
We move all terms containing g to the left, all other terms to the right
-4g=-17.56
g=-17.56/-4
g=4+1/2.5641025641026
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