Question

Diketahui 5(x+3)-25=3(4x-1). Nilai 2x-5 adalah...

Answer 1

5x + 15 - 25 = 12x - 3
5x - 10 = 12x - 3
7x = -7
x = -1

2x - 5 = 2 × (-1) - 5 = -2 - 5 = -7

Answer 2

5(x + 3)-25 = 3(4x - 1)
5x + 15 - 25 = 12x - 3
5x - 12x = -3 - 15 + 25
-7x = 7
x = -1

jadi X = -1 subtitusi ke 2x - 5
= 2x - 5
= 2(-1) - 5
= - 2 - 5
= -7