Question 215616
Lauren is shooting at a target in a fair. 
If she hits the target she receives 50p, if she misses she loses 20p. 
After 15 shots, Lauren she has made a profit of £1.20.
 How many hits has she had?
:
Let x = no. of hits
then
(15-x) = no. of misses
:
50x - 20(15-x) = 120 pence
:
50x - 300 + 20x = 120
:
50x + 20x = 120 + 300
:
70x = 420
x = {{{420/70}}}
x = 6 hits