Jawabanmu

2014-03-19T20:50:08+07:00
20 = 10x-6 x 6x-2 20 = 10x+6x-6-2 20 = 16x-8 x = 16+20-8 x = 36-8 x = 28
2014-03-19T21:44:36+07:00
20          = 2(5x - 3) × 2(3x - 1)
20          = (10x - 6) × (6x - 2)
20          = (10x.6x) + (10x.-2) + (-6.6x) +(-6.-2)
20          = 60x -20x -36x + 12
20          = 4x + 12
20 - 12   = 4x
8            = 4x
8 ÷ 4      = x
2            = x

jadi x = 2