Question

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

If −3(x+8)=−21, then x=−1.

(Please refer to attached image for more info.)

Answer 1

1. -3(x+8) = -21
2. Division property of equality
3. x + 8 = 7
4. Subtraction Property of Equality

(Not quite sure whether #2 is division or distributive, but i'm 90% sure it's division).