Doug earns $10.50 per hour working at a restaurant on friday he spent 1 3/4 hours cleaning 2 3/4 hours doing paper work and 1 5/12 hours serving costumers what were doug's earnings

$62.13

Add up the hours.

1 3/4 + 2 3/4 + 1 5/12

Convert to improper fractions:

7/4 + 11/4 + 17/12

Convert 7/4 and 11/4 into denominators of 12:

21/12 + 33/12 + 17/12

Add the numerators:

71/12

Convert to mixed number:

5 11/12

Multiply by 10.5:

5 11/12 * 10.5 = 62.125

So he earned approximately $62.13

Cdoes not have two variables

It equals 1373.5 that’s the solution