3/5q = 1
you want to move the 3/5 to the other side by equalizing both sides. Multiply both sides by 5/3
5/3 * 3/5q = 1 *5/3
5/3 cancels out 3/5 on the left side of the equation
1*5/3 = 5/3 on the right side of the equation
you're left with::::
q=5/3 OR q=1.667