Question

Factor -4.3 out of 12.9b - 21.5

Answer 1

Answer: -4.3(5-3b)

Explanation:

Divide both 12.9b and -21.5 each by -4.3 to work out what goes inside the brackets.

12.9b ÷ -4.3 = -3b

-21.5 ÷ -4.3 = 5

Therefore, our answer is: -4.3(5-3b)