х=2(15-(х-15))

Question

х=2(15-(х-15))

Answer 1

Х = 2(15-х + 15)
х = 30-2х +30
х +2х = 30+30
3х = 60
х =20

Answer 2

Х=2(15-х+15)
х=2(30-х)
х=60-2х
3х=60
х=20