Bart works 36 hr a week and makes $612.charles worked 34hr a week and makes$663.who makes more per he how do you know

Charles

Step-by-step explanation:

Bart worked for 36 hours, and earned $612.

$612 / 36 = $17 is what he earned per hour

Charles worked for 34 hours, and earned $663.

$663 / 34 = $19.5 is what he earned per hour

You don't even need to solve for anything actually. Just looking at the given values, you will see that Charles earned more money despite working less hours compared to Bart.

Divide by 3 get a remainder of 2
5, 8, 11, 14, 17, 20, ...
Divide by 5 get a remainder of 2
7 , 12, 17, 23, ...
Divide by 7 get a reminder of 5
12, 19, 26, 33, ...
 
And find a number in all three lists

Not the most convenient way for sure, but since 47 works it will not take too long