Question

12. tentukan himpunan penyelesaian daripersamaan berikut:
a). 2x-6 = 9x +8
b). 2 - 2/3x = 4
c). 2x/3 - 3/3 + 4x/2 + 4/2 = 2x +3

Answer 1

A) 2x-6 = 9x + 8
2x - 9x = 8 + 6
-7x = 14
x = 14/-7
x = -2
b) 2 - 2/3 = 4
(3). 2 - (3).2/3x = (3).4
6 - 2x = 12
2x = 12 - 6
2x = 6
x = 3
c) 2x/3 - 3/3 + 4x/2 + 4/2 = 2x + 3
(6). 2x/3 - (6).3/3 + (6).4x/2 + (6).4/2 = (6).2x + 3
4x - 6 + 12x + 12 = 12x + 18
16x + 6 = 12x + 18
16x - 12x = 18 - 6
4x = 12
x = 12/4
x = 3