Question

Drag a statement or reason to each box to complete this proof. If −3(x+8)=−21, then x=−1.

Answer 1

Answer:

Yes, it's true. X=-1

Step-by-step 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,

$\frac{-3(x-8)}{-3} =\frac{-21}{-3}$

Now we can simplify and the result is,

$x+8=7$

Because $\frac{-3(x+8)}{-3}=\frac{-3}{-3} (x+8)=x+8$ and $\frac{-21}{-3} =7$

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

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

And we have: $x=-1$

Answer 2

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