Martha has 26 coins whose total value is sh.205. There are thrice as many Sh.10 coins as there are
Sh.20 coins. The rest are 50cts coins. Find the number of Sh.20 coins that Martha has.
number of 20 coins ---- x
number of 10 coins ---- 3x
number of 50 coins = 26-4x
20x + 10(3x) + 50(26-4x) = 205
20x + 30x + 1300 - 200x = 205
-150x = -1095
x = 7.3
not possible, can't have partial coins
check your typing or else the question is bogus