Answer:
$ 150
Step-by-step explanation:
Given:
Cost price of a microwave = $105
Discount % = 30
Question asked:
what was the price of the microwave before sale = ?
Solution:
Let the price of the microwave before sale = [tex]x[/tex]
Price before sale - 30 % discount = cost price of microwave (by Javier)
[tex]x - 30\% of x = 105[/tex]
[tex]x - \frac{30x}{100} = 105[/tex]
[tex]\frac{70x}{100} = 105\\[/tex]
Multiplying both side by 100
[tex]70x = 105 \times 100[/tex]
[tex]70x = 10500[/tex]
Dividing both side by 70
[tex]x = \frac{10500}{70} \\x = 150[/tex]
x = price of the microwave before sale = $ 150
Thus, price of the microwave before the sale = $150