400(a-9)=800

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Solution for 400(a-9)=800 equation:



400(a-9)=800
We move all terms to the left:
400(a-9)-(800)=0
We multiply parentheses
400a-3600-800=0
We add all the numbers together, and all the variables
400a-4400=0
We move all terms containing a to the left, all other terms to the right
400a=4400
a=4400/400
a=11

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