Answer:
x = 12
Step-by-step explanation:
equation:
x + 4 = 16
to solve for x, subttract 4 on each side:
x + 4 - 4 = 16 - 4
rule add 15 subtract 10
-2
★ 100% of 15 = X
★ 20% of 15 = Y
<u>Answers</u> : X = 15 and Y = 3