Jawabanmu

2014-01-22T19:04:31+07:00
6x - 10 =2x +2
6x - 2x = 2 + 10
4x = 12
x = 3

5x - 4 =3x - 8
5x - 3x = -8+4
2x = -4
x = -2

-7 - 2a = 4a - 19
-2a - 4a = -19 + 7
-6a = -12
a = 2

15x - 7 =8 - 10 x
15x + 10x = 8 +7
25x = 15
x = 3/5
Nilai
2x + 1
2 x 3/5 + 1
6/5 + 1
6/5 + 5/5
11/5 = 2 1/5