3a+7=13(a+-2)

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Solution for 3a+7=13(a+-2) equation:



3a+7=13(a+-2)
We move all terms to the left:
3a+7-(13(a+-2))=0
We add all the numbers together, and all the variables
3a-(13(a-2))+7=0
We calculate terms in parentheses: -(13(a-2)), so:
13(a-2)
We multiply parentheses
13a-26
Back to the equation:
-(13a-26)
We get rid of parentheses
3a-13a+26+7=0
We add all the numbers together, and all the variables
-10a+33=0
We move all terms containing a to the left, all other terms to the right
-10a=-33
a=-33/-10
a=3+3/10

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