Answer:
4
Step-by-step explanation:
In all these questions, you want to ask what is happening to N and in what order. Then do the opposite to both sides.
#1 first 12/N, then x 123
so must divide both sides by 123
12 / N x 123 / 123 = 369 / 123
12 / N = 3
*now you can just ask what number divides 12 and makes 3 = 4
or more complex
[tex]\frac{12}{N} = \frac{3}{1}[/tex] then cross multiply 12x1 = Nx3
12 = 3N
Then divide both sides by 3
12/3 = 3N/3
4 = N
