tentukan nilai x dari persamaan linear satu variabel berikut :
a) 6x - 5 = 2x + 11
b) 3 ( 2x - 1 ) =5 ( x - 1 )
a) 6x - 5 = 2x + 11
b) 3 ( 2x - 1 ) =5 ( x - 1 )
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Jawaban:
Bagian a.
6x - 5 = 2x + 11
6x - 2x = 11 + 5
4x = 16
x = 16/4
x = 4
Bagian b.
3(2x - 1) = 5(x - 1)
6x - 3 = 5x - 5
6x - 5x = -5 + 3
x = -2
'조슈아' (Svt)
a) 6x - 5 = 2x + 11
(6 - 2)x = (11 + 5)
4x = 16
x = 16 ÷ 4
x = 4
b) 3(2x - 1) = 5(x - 1)
3(2x) - 3(1) = 5(x) - 5(1)
6x - 3 = 5x - 5
(6 - 5)x = -5 + 3
1x = -(5 - 3)
x = -2