bantuin yah ini gmna caranya.. Cuman yg di centang... Plaseeeee ini dikumpulkan besok

1a) x + 3 = 6
x = 6 - 3
x = 3
b) 3x - 8 = 19
3x = 19 + 8
3x = 27
x = 9

4) misal
p = x + 7
l = x
k = 2 × (p + l)
42 = 2 × (x + 7 + x)
42 = 2 × (2x + 7)
42 = 4x + 14
42 - 14 = 4x
28 = 4x
x = 7
jadi
p = x + 7 = 7 + 7 = 14 m
l = 7 m

1) 3x - 6 = 12
3x = 12 + 6
3x = 18
x = 6

b) 9x - (3x + 6) = 2x + 8
9x - 3x - 6 = 2x + 8
6x - 6 = 2x + 8
6x - 2x = 8 + 6
4x = 14
x = 14 / 4