Question

Evaluate the expression 5x-3x for x=2

Answer 1

x is a placeholder for a number. Think of it as a box. Inside the box, we're told that 2 is there.

So we'll replace every x with 2 and use PEMDAS

5*x - 3*x = 5*2 - 3*2 = 10 - 6 = 4

After simplifying, the answer is 4.

Answer 2

4

Explanation:

5x-3x

We can simplify this expression

2x

Now we can substitute x=2

2(2)

=4