Answer:
Step-by-step explanation:
<u>15 - 7x </u>= 9
4
-7x = 9(4) - 15
x = 21/-7
x = -3
proof:
<u>15 - 7(-3) </u>= 9
Your answer is $16.40
The answer is A 21
255 was the amount of lara's sale
Take the number of weeks as x
12x = 544 - 100
x =444/12
x = 37
Thus it would take her 37 weeks to buy her a laptop
