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a : b = 5 : 2, maka 2a = 5b
2. 2a - 5b = 0
eliminasi :
25a - 5b = 120
2a - 5b = 0
23a = 120
a = 120/23
b = 48/23
c = (1/7)(a + b) = 1/7(168/23)
c = 24/23
a : b = 5 : 2, maka 2a = 5b
2. 2a - 5b = 0
eliminasi :
25a - 5b = 120
2a - 5b = 0
23a = 120
a = 120/23
b = 48/23
c = (1/7)(a + b) = 1/7(168/23)
c = 24/23