We have the equation:
p = 1.4n + 480, where:
p represents the amount Trevor is paid for the week
n represents the light sabers Trevor sold
Let's answer question 1:
How much will Trevor be paid if he sells 380 light sabers for the week?
We replace n by 380 in the formula to find p, as follows:
p = 1.4 * 380 + 480
P = You can do the calculations
Let's answer question 2
How many light sabers did Trevor sell if he earned $1,670.00?
We replace p by 1,670 to find n, as follows:
1,670 = 1.4n + 480
1.4n = 1,670 - 480
1.4n = 1,190
Dividing by 1.4 at both sides, we have:
1.4n/1.4 = 1,190/1.4
n = You can do the division