Solve
Divide both sides by the coefficient. The variable is multiplied by , so dividing by isolates it in one step:
The answer is a fraction, not an integer — does not divide — and leaving it as a fraction keeps it exact.
Reduce the fraction. Factor both parts: and , so the greatest common divisor is :
Since is prime and does not divide , this is lowest terms.
Give the decimal form. The denominator contains a , so the decimal repeats:
Verify in the original equation.
Cancelling the into the first makes the check a single mental step. Confirmed in exact rational arithmetic ✓.
Sanity-check the size. Since is a bit more than half of , the answer should be a bit more than — and is ✓. That quick magnitude check catches a flipped fraction such as immediately.
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