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(a/7)+(5/7)=(2/7)
We simplify the equation to the form, which is simple to understand
(a/7)+(5/7)=(2/7)
Remove unnecessary parentheses
+ 0.14285714285714a+( + 0.71428571428571)=( + 0.28571428571429)
Remove unnecessary parentheses
+ 0.14285714285714a + 0.71428571428571=+( + 0.28571428571429+)
Remove unnecessary parentheses
+ 0.14285714285714a + 0.71428571428571=0.28571428571429
We move all terms containing a to the left and all other terms to the right.
+ 0.14285714285714a=0.28571428571429-0.71428571428571
We simplify left and right side of the equation.
+ 0.14285714285714a=-0.42857142857142
We divide both sides of the equation by 0.14285714285714 to get a.
a=-3
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