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

Yes, it's true. X=-1

Step-by-step explanation:

We have,

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

Now we can simplify and the result is,

Because and

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

And we have:

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step-by-step explanation: