Question

you you have 80¢ in your backpack and dimes and quarters let's represent the number of times in white representing number of quarters

Answer 1

1.

T = Total money in your backpack = $0.80

x = Number of dimes

y = Number of quarters = 2

T = $0.1x + $0.25y

Replacing the data provided:

0.8 = 0.1x + 0.25(2)

0.8 = 0.1x + 0.5

Solving for x:

Subtract 0.5 from both sides:

0.8 - 0.5 = 0.1x + 0.5 - 0.5

0.3 = 0.1x

Divide both sides by 0.1:

0.3/0.1 = 0.1x/0.1

3 = x

So, you have 3 dimes