Answer:
y = 
x + y = 18
Step-by-step explanation:
Let the kitten's weight be y and the cat's weight be x
<u><em>Condition # 1: </em></u>
y = 
<u><em>Condition # 2:</em></u>
x + y = 18
Answer- -(x-4)(3x-5)
Work- -3x^2+12x+5x-20
-3x(x-4)+5(x-4)
Solve for y like the top equation:
2y = -4ax + 11
2y/2 = -4ax/2 + 11/2
y = -2ax + 11/2