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7(1+8a)+23=-250
We move all terms to the left:
7(1+8a)+23-(-250)=0
We add all the numbers together, and all the variables
7(8a+1)+23-(-250)=0
We add all the numbers together, and all the variables
7(8a+1)+273=0
We multiply parentheses
56a+7+273=0
We add all the numbers together, and all the variables
56a+280=0
We move all terms containing a to the left, all other terms to the right
56a=-280
a=-280/56
a=-5
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