A bicycle store costs $2800 per month to operate. The store pays an average of $50 per bike. The average selling price of each bicycle is $90. How many bicycles must the store sell each month to break even?
The store must sell bicycles each month to break even.
(Type a whole number.)

70 Bikes

Step-by-step explanation:

[using b as a variable for bikes]

2800=-50b+90b

[2800 is total cost of store with-50 being cost per bike and 90 being selling point of bike]

2800=40b [simplified by combining -50 with 90]

70=b [divided 2800 by 40 to get the break even for the store]

93.8

step-by-step explanation:

lets say, first number = x

second number = 3x+7

total = 49

(x)+(3x+7)= 49

4x+7 = 49

4x = 42

x = 42/4

x= 10.5

x= 10.5

3x+7 = 3(10.5)+7 = 93.8

hope this