Question

Which of the following is a solution to the equation 16= 4x - 4 ?

A.-5
B. -4
C. 5
D. 16

Answer 1

16 = 4x - 4

1. Add '4' to both sides


`16 + 4 = 4x - 4 + 4`


`20 = 4x`

2. Divide '4' to both sides


`(20)/(4) = (4x)/(4)`


`5 = x`

The answer is C.

Answer 2

16=4x-4

To solve for x, you have to get the variable alone on one side. First, add 4 to both sides of the equation.

20=4x

Finally, divide each side by 4

5=x
x=5 (C)

To check your answer, substitute 5 as x into the equation.

16=4x-4
16=4(5)-4
16=20-4
16=16

x=5

The correct answer is C.

Hope this helped! :)