tentukan himpunan penyelesaian dari persamaan linear satu variabel dibawah ini: a) x - 9 = 20 b) 9 (6x + 15) = 6x + 9 c) 3 (2x + 5) = 2x + 3 d) 6x - 9 = 2x +

a. x-9 = 0
x = 0+9
x = 9

b. 9(6x+15) = 6x+9
54x+135 = 6x+9
54x-6x = 9-135
48x = -126
x = -126/48
x = -21/8
5
x = -2---
8

c. 3(2x+5) = 2x+3
6x+15 = 2x+3
6x-2x = 3-15
3x = -12
x = -12/3
x = -4

d. 6x-9 = 2x+7
6x-2x = 7+9
3x = 16
x = 16/3
1
x = 5---
3

e. 18x-7 = 6x+21
18x-6x = 21+7
12x = 28
x = 28/12
x = 7/3
1
x = 2---
3

f. 2/3x +10 = x+6
2x+30 = 3x+18
2x-3x = 18-30
-x = -12
x = 12

g. 1/4x +5 = x+3
1x+20 = 4x+12
x-4x = 12-20
-3x = -8
x = -8/-3
x = 8/3
2
x = 2---
3

semoga membantu.........^^