Solve the equation and check your answer.

StartFraction q plus 6 Over 5 EndFraction plus StartFraction q minus 2 Over 2 EndFraction equals eight fifths

1 answer

To solve the equation

\[ \frac{q + 6}{5} + \frac{q - 2}{2} = \frac{8}{5}, \]

we first want to eliminate the fractions. We can do this by finding a common denominator. The least common multiple of 5 and 2 is 10.

Now, we will multiply both sides of the equation by 10:

\[ 10 \cdot \left(\frac{q + 6}{5}\right) + 10 \cdot \left(\frac{q - 2}{2}\right) = 10 \cdot \left(\frac{8}{5}\right). \]

This simplifies to

\[ 2(q + 6) + 5(q - 2) = 16. \]

Now, distribute on both sides:

\[ 2q + 12 + 5q - 10 = 16. \]

Combine like terms:

\[ (2q + 5q) + (12 - 10) = 16 \implies 7q + 2 = 16. \]

Next, we isolate \(q\) by subtracting 2 from both sides:

\[ 7q = 14. \]

Now, divide both sides by 7:

\[ q = 2. \]

Checking the Solution

Now we substitute \(q = 2\) back into the original equation to verify:

\[ \frac{2 + 6}{5} + \frac{2 - 2}{2} = \frac{8}{5}. \]

This simplifies to:

\[ \frac{8}{5} + \frac{0}{2} = \frac{8}{5} \implies \frac{8}{5} + 0 = \frac{8}{5}. \]

Since both sides are equal, the solution \(q = 2\) is correct.

Thus, the solution is

\[ \boxed{2}. \]