Chris and Rox sell pens. Together they sold a total of 84,643. chris sold 3 more than 4 times what rox sold. How many did each sell?
Let R = amount that Rox sold.
Chris sold 4R+3
4R+3 +R = 84643
5R = 84640
5R/5 = 84640/5
R=16928
so Chris sold 4(16928)+3= 67715
Check:
67715+16928 = 84643