I’m having trouble on clearing fractions. in my class, there are parentheses in the original equation. and when using distributive property, we don’t multiply the numbers within the original parentheses. why?

Start with

Multiply both sides by 6:

On the left hand side, we have

And we can distribute the 42 to get

On the right hand side, we have

So, the equation becomes

Subtract 210x from both sides to get

Subtract 4 from both sides to get

Divide both sides by 12 to get

step-by-step explanation: