selesaikan persamaan nilai mutlak | 2y + 5 | = | 7 - 2y | tolong bantu

Materi : Persamaan Nilai Mutlak

Pembahasan :
|2y + 5| = |7 - 2y|
(2y + 5)² = (7 - 2y)²
(2y + 5)² - (7 - 2y)² = 0
(2y + 5 + 7 - 2y)(2y + 5 + 2y - 7) = 0
12(4y - 2) = 0
4y - 2 = 0
4y = 2
y = 1/2

Hp = {1/2}