Jawabanmu

2014-01-17T20:38:59+07:00
1. 5a - b = 24
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
2 3 2
2014-01-17T20:49:56+07:00
 5a - b = 24
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
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