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ratih = x
jaka = y
* x + y = 56.000
* x - y = 600
eliminasi
x + y = 56.000
x - y = 600 -
2y= 55.400
y= 55.400
2
uang Jaka = 27.700
substitusi
x - y = 600
x - 27.700 = 600
x = 600 + 27.700
uang ratih = Rp.28.300