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(57/2)=a-(30/7)+(15/7)
We simplify the equation to the form, which is simple to understand
(57/2)=a-(30/7)+(15/7)
Remove unnecessary parentheses
+28.5=a-(+4.2857142857143)+(+2.1428571428571)
Remove unnecessary parentheses
+28.5=a-4.2857142857143+(+2.1428571428571)
Remove unnecessary parentheses
+28.5=+a-4.2857142857143+2.1428571428571
We move all terms containing a to the left and all other terms to the right.
-1a=-4.2857142857143+2.1428571428571-28.5
We simplify left and right side of the equation.
-1a=-30.642857142857
We divide both sides of the equation by -01 to get a.
a=30.642857142857
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