Jawabanmu

2014-02-05T16:56:57+07:00
1. 6x + 1 = 12x - 2           
    6x - 12x = -2 - 1
    -6x = -3
    x = 1/2
2. 2x - 1 = 5x - 10
    2x-5x = -10+1
    -3x = -9
    x = 3
3. 5x + 2y = 12 | x2
    2x + 5y =9    |x5
    
    10x + 4y = 24
    10x + 25y = 45
    _____________ _
    -21y = -21
         y = 1

5x +2y = 12 , y =1
5x +2 = 12
5x = 10
x = 2