tentukan penyelesaian persamaan berikut:

a) 3x - 2 = 4
3x = 4 + 2
3x = 6
x = 6/3
x = 2

b) 7 - 2x = 1
-2x = 1 - 7
-2x = -6
x = -6/-2
x = 3

5) 5x + 2 = x + 10
5x - x = 10 - 2
4x = 8
x = 8/4

8) 2(x + 1) + 3 = 20 - x
2x + 2 + 3 = 20 - x
2x - x = 20 - 2 - 3
x = 15

10) 2(x - 3) + 7 = 3(x + 4)
2x - 6 + 7 = 3x + 12
2x - 3x = 12 + 6 - 7
-x = 11
x = -11