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0.3*10+3a=50
We simplify the equation to the form, which is simple to understand
0.3*10+3a=50
We move all terms containing a to the left and all other terms to the right.
+3a=+50-3
We simplify left and right side of the equation.
+3a=+47
We divide both sides of the equation by 3 to get a.
a=15.666666666667
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