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31+1=-3.6(a-1)
We move all terms to the left:
31+1-(-3.6(a-1))=0
We add all the numbers together, and all the variables
-(-3.6(a-1))+32=0
We calculate terms in parentheses: -(-3.6(a-1)), so:We get rid of parentheses
-3.6(a-1)
We multiply parentheses
-3.6a+3.6
Back to the equation:
-(-3.6a+3.6)
3.6a-3.6+32=0
We add all the numbers together, and all the variables
3.6a+28.4=0
We move all terms containing a to the left, all other terms to the right
3.6a=-28.4
a=-28.4/3.6
a=-7+1/1.125
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