90=-5(3a-6)

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Solution for 90=-5(3a-6) equation:



90=-5(3a-6)
We move all terms to the left:
90-(-5(3a-6))=0
We calculate terms in parentheses: -(-5(3a-6)), so:
-5(3a-6)
We multiply parentheses
-15a+30
Back to the equation:
-(-15a+30)
We get rid of parentheses
15a-30+90=0
We add all the numbers together, and all the variables
15a+60=0
We move all terms containing a to the left, all other terms to the right
15a=-60
a=-60/15
a=-4

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