Question 1204265
x = numbr of P5 coins.
y = number of P20 coins.
your 2 equations are:
x + y = 190
5x + 20y = 2000
multiply both sides of the first equation by 5 to get:
5x + 5y = 5 * 190
5x + 20y = 2000
subtract the first equation from the second to get:
15y = 2000 - 950
solve for y to get:
y = (2000 - 950) / 15 = 1050 / 15 = 70
since x + y = 190, then x = 120
they have 120 P5 coins and 70 P20 coins.
120 * P5 + 70 * P20 = P2000 confirming the number of P5 and P20 is correct.
your solution is there are 120 P5 coinjs and 70 P20 coints for a total of P2000.