Answer:
S=64
Step-by-step explanation:
if the s is what your looking for
s=64
s/4-7+7=9+7
s/4=16
4s/4=16
well combine like terms
-3x = -21
divide both sides by -3
x = 7
x=4y/5 + 24/5
225 m2
area= side*side
= 15x15
