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5a-\frac{2}{3}-6+2a=0
Use the distributive property to multiply -2 by 3-a.
5a-\frac{2}{3}-\frac{18}{3}+2a=0
Convert 6 to fraction \frac{18}{3}.
5a+\frac{-2-18}{3}+2a=0
Since -\frac{2}{3} and \frac{18}{3} have the same denominator, subtract them by subtracting their numerators.
5a-\frac{20}{3}+2a=0
Subtract 18 from -2 to get -20.
7a-\frac{20}{3}=0
Combine 5a and 2a to get 7a.
7a=\frac{20}{3}
Add \frac{20}{3} to both sides. Anything plus zero gives itself.
a=\frac{\frac{20}{3}}{7}
Divide both sides by 7.
a=\frac{20}{3\times 7}
Express \frac{\frac{20}{3}}{7} as a single fraction.
a=\frac{20}{21}
Multiply 3 and 7 to get 21.