Question 762969
x = 10c
y = 20c
x + y = 202...1
10x + 20y = 3190...2
Multiply (1) by 20
20x + 20y = 4040...3
10x + 20y = 3190...4
Subtract (4) from (3)
10x       = 850
  x       = 85
Substitute x = 85 in (1)
x + y = 202
85 + y = 202
     y = 202 - 85
     y = 117
Manori has 85 x 10c + 117 x 20c
Hope this helps.
:-)