Asked by JOHN

in a competition, seven points were awarded for every game won and 3 points deducted for lost. Adhiambo attempted 20 games and was awarded 80 points, how many games were won?
Answered by R_scott
W + L = 20 ... 3 W + 3 L = 60

7 W - 3 L = 80

adding equations (to eliminate L) ... 10 W = 140