Step-by-step explanation:
Our basic problem looks like:
y = qx
When we plug in our variables, we get:
20 = q * 4
To isolate q, we divide both sides by 4:
20 / 4 = q * 4 / 4, which becomes:
5 = q, leading to 5x = y
now to plug in our 5 variable:
5 * 5 = 25 = y
