-18=4a+5a

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Solution for -18=4a+5a equation:



-18=4a+5a
We move all terms to the left:
-18-(4a+5a)=0
We add all the numbers together, and all the variables
-(+9a)-18=0
We get rid of parentheses
-9a-18=0
We move all terms containing a to the left, all other terms to the right
-9a=18
a=18/-9
a=-2

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