rahul played weel in this season . his current batting averagge is 53 . if he score 78 runs in today match . his batting average will become 58 . how many matches had he played in this season .
"53 x + 78 = 58 ( x + 1 ) = > 5 x = 20 = > x = 4 answer : a"
divide(subtract(78, 58), subtract(58, 53))