Answer:
Number 4
Step-by-step explanation:
Side-Angle-Side, it has to be between the two sides.
Answer: x = -3
Step-by-step explanation:
i simply divided by -7, in order to get x by itself.
-7/-7x = 21/-7
that cancels out the -7 on the left side, and leaves us with -3 on the right side!
x = -3