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68+4a/12+a=5.5
We move all terms to the left:
68+4a/12+a-(5.5)=0
We add all the numbers together, and all the variables
a+4a/12+62.5=0
We multiply all the terms by the denominator
a*12+4a+(62.5)*12=0
We add all the numbers together, and all the variables
4a+a*12+750=0
Wy multiply elements
4a+12a+750=0
We add all the numbers together, and all the variables
16a+750=0
We move all terms containing a to the left, all other terms to the right
16a=-750
a=-750/16
a=-46+7/8
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