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145=-5(8n+3)
We move all terms to the left:
145-(-5(8n+3))=0
We calculate terms in parentheses: -(-5(8n+3)), so:We get rid of parentheses
-5(8n+3)
We multiply parentheses
-40n-15
Back to the equation:
-(-40n-15)
40n+15+145=0
We add all the numbers together, and all the variables
40n+160=0
We move all terms containing n to the left, all other terms to the right
40n=-160
n=-160/40
n=-4
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