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a/2.5=-30
We move all terms to the left:
a/2.5-(-30)=0
We add all the numbers together, and all the variables
a/2.5+30=0
We multiply all the terms by the denominator
a+30*2.5=0
We add all the numbers together, and all the variables
a+75=0
We move all terms containing a to the left, all other terms to the right
a=-75
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