The value of x when y = 2 is x = 36
Step-by-step explanation:
The equation that we have in this problem is:

In order to find the value of x when y is equal to
y = 2
We need to re-arrange the equation making x the subject.
We proceed as follows:
1) We add +7 on both sides:

2) Now we multiply both sides by 4:

3) Now we can substitute y = 2 and find the value of x:

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Answer:
144
Step-by-step explanation:
Length of 1 side is 12 so area is 12*12
It would be better to buy 12 bars for 10 dollars and the rate would be $1.2. The rate for 5 bars would be $1.25.