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a + b = 79
a - b = 11 -
2b = 68
b = 68/2
b = 34
a + b = 79
a + 34 = 79
a = 79 - 34
a = 45
a = 45 dan b = 34
68 : 2 = 34
34 + 11= 45
bilangan trsbt adalah 34 dan 45