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x + 3y = 42.000
b. x + 3y = 42.000
x + y = 22.000
-------------------------- dikurang
2y = 20.000
y = 20.000 / 2
= 10.000
x + Y = 22.000
x + 10.000 = 22.000
x = 22.000 - 10.000
= 12.000
Jadi uang aqil = 12.000. Uang Ari = 10.000
c. Selisih = 12.000 - 10.000 = 2000