7+5a=a+21

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Solution for 7+5a=a+21 equation:



7+5a=a+21
We move all terms to the left:
7+5a-(a+21)=0
We get rid of parentheses
5a-a-21+7=0
We add all the numbers together, and all the variables
4a-14=0
We move all terms containing a to the left, all other terms to the right
4a=14
a=14/4
a=3+1/2

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