+60 Ali and Ben each have a sum of money. If Ali gives $6.20 to Ben, he will have 1/5 of Ben's amount. If Ben gives $12.80 to Ali, he will have 3 times as much money as Ali. How much money does Ben have?
+1164 If Ali gives $6.20 to Ben, he will have 1/5 of Ben's amount,
Ali : 1u + 6.20
Ben : 5u - 6.20
If Ben gives $12.80 to Ali, he will have 3 times as much money as Ali,
Ali : 1p - 12.80
Ben : 3p + 12.80
1u + 6.20 -------> 1p - 12.80
1u -------> 1p - 12.80 - 6.20 = 1p - 19
5u - 6.20 -------> 3p + 12.80
5(1p - 19) - 6.20 = 5p - 101.20 -------> 3p + 12.80
1p -------> (12.80 + 101.20)/(5 - 3) = 57
3p + 12 .80 -------> 3 x 57 + 12 .80 = 183.80
Ans : $183.80.
P6 math.
