Question

On Tuesday a local hamburger shop sold a combined total of 345 hamburgers and cheeseburgers the number of cheeseburgers sold was two times the number of hamburger sold how many hamburgers were sold on Tuesday

Answer 1

The equation is:
$h + c = 345 \\ \\ c = 2h$
Replace c with 2h:
$h + 2h = 345 \\ \\ 3h = 345$
Divide both sides by 3:
$h = 115$