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a- b = 40
__________ -
2b = 60
b= 60/ 2
b= 30
a + b = 100
a + 30 = 100
a= 100 -30
a= 70
x-y = 40
pake eliminasi (dikurang)
2y = 60
y = 30
mencari x:
x+y = 100
x = 100-30 = 70
dua bilangannya adalh 30 dan 70
kalo menurut saya tdk bisa karena ada 2 bilangan jd hrs ada 2 variabel
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