Answer:
$21
Step-by-step explanation:
21+42=63
x=63:3
x=$21
Answer:
2500
Step-by-step explanation:
Let the first square number be
then the next square number is
.
The difference between these two consecutive numbers is 99.
This implies that:

We expand to get:

Simplify:


Divide both sides by 2

Therefore the value of the larger perfect number is
.
The answer would be 11x-12
Answer:t+3
Step-by-step explanation:
4t+7t+3-10t
11t+3-10t
t+3