Hi

Let Kuz' age be x, the Lebron's age is (x+5)

The product of their ages is 21 years less than 15 times the sum of their ages

Write as You Read:

x(x+5) = 15(x + (x+5)) -21

Simply and solve:

x^2 + 5x  = 15(2x+5)-21

x^2 + 5x = 30x + 75 - 21

x^2 -25x - 54 = 0

 x = 27    (tossing out negative value)

Kuz is 27 years old

Wish You the Best in your Studies. 

RELATED QUESTIONS

Julie is 2 years older than her sister Rebecca.  If the product of their ages is one less  (answered by josgarithmetic)

Nick is 5 years older than will. The sum of their ages is 21. How old is Nick?  (answered by Alan3354)

Ana is five years older than Beth.In 5 years, the product of their age is 1.5 times the... (answered by checkley75)

Renee is 5 years older than Paulo, she is also 7 years older than Peter. The sum of their  (answered by mamiya)

Harry is 6 years older than his cousin Carl, and the product of their ages is 9 less than  (answered by Alan3354)

Chloe is 2 years older than his husband damon. if the product of their ages is 30 more... (answered by emargo19,MathTherapy)

thirdy is 4 years older than his brother kai. if the product of their ages is 4 less than  (answered by josgarithmetic)

Larry is 11 years older than Moe.  The sum of their ages is 15 years.  How old is each... (answered by josgarithmetic)

John is 5 years older than AL. Two years ago the product of their ages was 30 less than... (answered by stanbon,Edwin McCravy)