What is this

3 (4x - 2) = 30

x = 3

Step-by-step explanation:

Use the distributive property and distribute the 3 throughout the equation:

3 (4x - 2) = 30

3 (4x) - 3 (2) = 30

12x - 6 = 30

12x - 6 + 6 = 30 + 6 - Add 6 to both sides of the equation

12x = 36 - Divide both sides by 12

x = 3

3 (4x - 2)

You have to distribute!

3•4x is 12x

3•-2 (three times negative two) is - 6

So 12x + (-6) or just 12x - 6

So what you do, is because there is a negative six add a positive six to both sides that way it ends up as

12x = 30

Then you want to isolate the variable

There us a positive twelve so you want to take away 12 from both sides giving you 18

X = 18