Question

find the value of the following equation b_7= 10​

Answer 1

Answer:

21 – 3 (b – 7) = b + 20

⇒ 21 – 3b + 21 = b + 20

⇒ -3b + 42 = b + 20

⇒ -3b – b = 20 – 42 ⇒ -4b = -22

⇒ b = -22/-4 = 11/2

∴ b = 11/2 = 5.1/2

Answer 2

Answer:

b=17

Step-by-step explanation:

b-7=10

b=10+7

b=17