Hamish and Harry work as plumbers. Harry earns a dollar more than 5/4 the amount Hamish earns per hour. The amount Harry earns per hour is $2 less than 7/5 the amount Hamish earns per hour. How much does each of them earn per hour?

If x is the amount Hamish earns then

Harry earns

$1 + (5/4) •x and also (7/5) •x-$2

$1 + (5/4) •x = (7/5) •x-$2

$1+$2 = (7/5) •x - (5/4) •x

3 = (7•4•x-5•5•x) / 20

3=3x/20

3•20=3x

X=20, Hamish earns $20

Substitute x in one of the expressions

1 + (5/4) •20=1+25=26, Harry earns $26