Himpunan penyelesaian dari |5x-6|-4 = 10 adalah…
a. {4, 1 3/5}
b. {4,-1 3/5 }
c. {-1 3/5}
d. {2}
e. {4}
Jawab :
|5x-6|-4 = 10
|5x-6| = 14
dalam nilai mutlak,nilai x dapat berupa bilangan positif maupun
negatif.Cari nilai x dengan cara :
(5x-6) = 14 atau –(5x-6) = 14
5x = 20 atau -5x+6 = 14
5x = 20 atau -5x = 8
x = 4 atau x = -8/5
x = 4 atau x = -1 3/5
b. {4,-1 3/5}
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