Jawabanmu

2014-09-04T16:33:19+07:00
4a = 10
a = 10 / 4
a = 5 / 2
a = 2.5

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2014-09-04T16:57:56+07:00
>ax + 5y = 10    substitusikan (2,4)
>a(2) +5(4) =10
>2a + 20 =10
>2a = -10
>a = -10/2 = -5
1 5 1