Answer:
- 12k² + kl
Step-by-step explanation:
Given
7kl - 3k(4k + 2l) ← distribute parenthesis by - 3
= 7kl - 12k² - 6kl ← collect like terms
= - 12k² + kl
4x+x = 30
5x = 30
x = 30/5 =6
6*4 = 24 boxers
and 6 spaniels
15-3=12
12/3=4
4 books