Answer:
150
Step-by-step explanation:
Ok, so this sign | x | means additive inverse. This states that the given number will be converted to its opposite sign
-21 = +21
-129 = +129
21 + 129 = 150
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Answers & Comments
Answer:
150
Step-by-step explanation:
Ok, so this sign | x | means additive inverse. This states that the given number will be converted to its opposite sign
-21 = +21
-129 = +129
21 + 129 = 150