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a+a+5+a+a=-1.24
We move all terms to the left:
a+a+5+a+a-(-1.24)=0
We add all the numbers together, and all the variables
4a+6.24=0
We move all terms containing a to the left, all other terms to the right
4a=-6.24
a=-6.24/4
a=-1+1/1.78571428571
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