Answer:
(3x - (3x - 5y))(3x + (3x - 5y))
Step-by-step explanation:
We use difference of squares to help factor.
Answer:x=18
3(x-5)=x+21
Distribute the 3
3x-15=x+21
Add 15 to each side
3x=x+36
Subtract x from each side
2x=36
Divide each side by 2
x=18
18x10^-2
36+90=126
90+2x=126
x=36/2
Answer: $27,500
