Answer
The lengths of the sides are: 28 cm, 28 cm, 37 cm
Work Step by Step
We first write the two equations to model the given applications:
$2x+y = 93$
$x+9 = y$
We first substitute to find:
$2x+(x+9) = 93$
Now, we use PEMDAS, a method for simplification. This acronym reminds us that we must first address parentheses, and then exponents. Next, we address multiplication and division, going from left to right. Lastly, we simplify addition and subtraction from left to right. This gives:
x = 28
We substitute back into the equation to find:
y = 37