60/100. Divide by 10: 6/10. Divide by 2: 3/5. She read 3/5 of the book :)
20 * (30 ÷ 65) = <span>9.23076923077</span>
Greetings!
Substitute:

Now we can input this into the other equation so, we only have one variable.
Solve for y.

Distribute the parenthesis.

Combine Like Terms.

Add
-50 to both sides.

Simplify.

Divide both sides by
0.01.

Simplify.

Input this value into the other equation.

Add
-700 to both sides.

Simplify.

The answer would be
300,700Hope this helps.
-Benjamin