Question

Jawab Lengkap Ya
7b+9=12b-16 berapa nilai dari b-8 adalah

Answer 1

7b + 9 = 12b - 16
⇔7b - 12b = (-9) - 16
⇔ -5b = -25
⇔ b = -25 : (-5)
b = 5
b - 8 = 5 - 8 = -3

Answer 2

7b+9 = 12b-16
7b-12b = -16-9
-5b = -25
b = 5

b-8 = 5-8
     = -3