Question

Using the cross multiplication method, which of the following is the solution to 21/(x+4) = 7/(x+2)?

Answer 1

3/(x+2)= x+1

Explanation:

21/7=3

x/x= x

4/2=2

Answer 2

Explanation:

Hello !

Using the cross multiplication method, which of the following is the solution to 21/(x+4) = 7/(x+2)?

21(x + 2) = 7(x + 4)

21x + 42 = 7x + 28

21x - 7x = 28 - 42

14x = -14

x = -14/14

x = -1