Himpunan penyelesaian persamaan │8 – 4x│ = 12 adalah {p, q}. Nilai p + q = ...

Persamaan Mutlak , Matematika Wajib Kelas X

| 8 - 4x | = 12

8 - 4x = 12
-4x = 4
x = -1

8 - 4x = -12
-4x = -20
x = 5

-1+5
= 4

|8 – 4x| = 12
☞ 8-4x = 12
-4x = 12-8
-4x = 4
x = -1
☞ -(8-4x) = 12
-8 + 4x = 12
4x = 12 + 8
4x = 20
x = 20/4
x = 5

HP : {-1 , 5}
p = -1
q = 5

Maka
p + q = -1 + 5 = 4