Answer:
a = -17
Explanation:
To solve this, we need to get A alone:
A + -21 = -38
—- +21- +21
Remember, when you do something to one side, you need to do the same thing to the other side.
Now:
A = -17!
To check:
-17 + -21 = -38
Therefore, A = -17
A= -17
A +-21 = -38
+21 +21
-38+21= -17
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