tentukan nilai x yang memenuhi persamaan berikut a.|2x-1|=3x b.|6-7x|=2
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Jawab:
(a.) x = ¹/₅
(b.) x = {⁴/₇ , ⁸/₇}
Penjelasan:
(a.) |2x-1| = 3x
-3x = 2x-1 = 3x
-3x-2x = -1 = 3x-2x
-5x = -1 = x
x = -1, x = ⁻¹/₋₅
x = -1, x = ¹/₅
Ruas kanan tidak blh negatif
= 3(-1) = 3(¹/₅)
= -3 = ³/₅
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Maka x = ¹/₅
(b.) |6-7x| = 2
-2 = 6-7x = 2
-2-6 = -7x = 2-6
-8 = -7x = -4
x = ⁻⁸/₋₇, x = ⁻⁴/₋₇
x = {⁴/₇ , ⁸/₇}
(xcvi)
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