7a+21=28a+14

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Solution for 7a+21=28a+14 equation:



7a+21=28a+14
We move all terms to the left:
7a+21-(28a+14)=0
We get rid of parentheses
7a-28a-14+21=0
We add all the numbers together, and all the variables
-21a+7=0
We move all terms containing a to the left, all other terms to the right
-21a=-7
a=-7/-21
a=1/3

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