Help ya girl out ah 20 points

Julio works 30 hours at rate r and 12 hours at rate 1.4r and earns 603.72.
Translate the English into math (equation)

30r + 12(1.4r) = 603.72
46.8r = 603.72
r = 603.72/46.8 = 12.90

The check is that 12.90*30 * 18.06*12 = 603.72

20y5 times 2 is 1010 times -2 is -20, plus y