Answer:
hence the profit percent is 58%.
u=2
Step-by-step explanation:
8u-21 = 2u-9
+21 +21
8u= 2u + 12
-2u -2u
6u= 12
divide by 6, u=2 !!
-5
a^2-25=0
a^2=25
take the square root of both sides
a=5, and -5
2n-9
