Question

Drag a statement or reason to each box to complete this proof.

If −3(x+8)=−21, then x=−1.

Answer 1

The answer is true because, you must use the distribute then add both sides by 24 then divide both sides by -3 and then you will come up with your answer x=-1 which means that statement is true

Answer 2

Yes, it's true. X=-1

Explanation:

We have,

`-3(x+8)=-21`

The objective is to discover which is the value of x, then first we need to divide both sides of the equation in -3,

`(-3(x-8))/(-3) =(-21)/(-3)`

Now we can simplify and the result is,

`x+8=7`

Because
`(-3(x+8))/(-3)=(-3)/(-3) (x+8)=x+8` and
`(-21)/(-3) =7`

Then we have to sum (-8) in both sides of the equation,

`x+8+(-8)=7+(-8)`

And we have:
`x=-1`