Jawabanmu

2014-03-27T18:42:34+07:00
A. 6x+x=26-5 7x=21 x=21/7 x=3 b.-4x=3-2 x=1/4 c. x-2x=36+12 -x=50 x=-50 -9x=1-10 x=1 d. x/4=5-2 x/4=3 x=3x4 x=12 moga ga keliru
2014-03-27T19:02:44+07:00
A)   6x + 5 = 26 -x
<=>6x + x + 5 = 26 - x + x
<=>7x + 5 - 5 = 26 - 5
<=>7x = 21
<=> x = 21 ÷ 7
<=> x = 3

b)    2 - 4x = 3
<=> 2 - 2 - 4x = 3 - 2
<=> - 4x = 1
<=>  x = 1/4

c)    x - 12 = 2x + 36
<=> x - 12 + 12 = 2x + 36 + 12
<=> x = 2x + 48
<=> x - 2x = 2x - 2x + 48
<=> -x = 48
<=> x = - 48

d)   - 5x - 4x + 10 = 1
<=> - 9x + 10 - 10 = 1 - 10
<=> - 9x = - 9
<=> x = 1

e)   2 + x/4 = 5
<=> 4. 2 + 4. x/4 = 4. 5
<=> 8 + x = 20
<=> 8 - 8 + x = 20 - 8
<=> x = 12
<=> -9x = - 9