x=wins
y=losses
x+y = 15
5x-2y = 54
so, substituting for y,
5x-2(15-x) = 54
x=12
In a competition ,5 points were awarded for each game won and 2 points for each game were deducted for each game lost .A pupil attempted 15 games and got 54 points .How many games did the pupil win?
2 answers
In a competition 5 points is awarded for each game won while 3 points is deducted for each game lost. A school participated in 20 games and won 14.how many points did it lose?
2 answers