The problem requires simplifying the following expression using the order of operations (PEMDAS/BODMAS):
$ \frac{(120 - 12) \div (24 \div 2) - 12 + 7}{5 \times 12 \div 10 - (6 \times 4) \div 12} $
First, simplify the numerator: $(120 - 12) \div (24 \div 2) - 12 + 7$.
The simplified numerator is 4.
Next, simplify the denominator: $5 \times 12 \div 10 - (6 \times 4) \div 12$.
The simplified denominator is 4.
Combine the simplified numerator and denominator:
$ \frac{\text{Numerator}}{\text{Denominator}} = \frac{4}{4} $
Perform the final division:
$ \frac{4}{4} = 1 $
The simplified value of the expression is 1.
Identify the number that will replace the question mark in the second equation based on the relationship represented in the first equation.

Simplify: $\frac{\sqrt{16x^4 - 72x^2y^2 + 81y^4}}{\sqrt{4x^2 - 12xy + 9y^2}} - (2x - 3y)$, given that $2x > 3y$.