Persamaan nilai mutlak satu variabel |-7x+4| = 3 Tolong banti dongg !!!

Persamaan Nilai Mutlak Satu Variabel.

|-7x + 4| = 3
-7x + 4 = 3
x = (3 - 4) / -7 = 1/7

-(-7x + 4) = 3
7x - 4 = 3
x = (3 + 4) / 7 = 1

x = 1/7 atau x = 1

Materi : Persamaan Mutlak

Pembahasan :
|-7x + 4| = 3
(-7x + 4)² = 3²
(-7x + 4)² - 3² = 0
(-7x + 4 + 3)(-7x + 4 - 3) = 0
(-7x + 7)(-7x + 1) = 0
x = 1
x = 1/7

Hp : {1/7 , 1}