Question

If 3x-13=8 find what the value of x-4

Answer 1

Find the value of x:

3x - 13 = 8

Add 13 to both sides:

3x = 21

Divide both sides by 3:

x = 7

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Find the value of x - 4:

x - 4 = 7 - 4

x - 4 = 3

Answer: 3

Answer 2

To find the value of x-4, we have to find the value of x firstly.

For that, you can take the equation 3x – 13 = 8.

When you solve this equation, we get the value of x and then substitute on other equation.

To get x value, 3x – 13 = 8; 3x = 8 + 13; 3x = 21; x = 21/3; x = 7. Now, substitute x value in x – 4 => 7 – 4 = 3.