Question

Evaluate the expression when x=8:

3x - 4

Answer 1

20

Explanation:

substitute x = 8 into the expression

3x - 4 = 3(8) - 4 = 24 - 4 = 20

Answer 2

Given x=8, insert 8 for x in the given equation.
3x-4
3(8)-4
3 times 8 is 24.
24-4
24 minus 4 is 20.
The answer is the third choice: 20.