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Solve in inverse operations -a-13=-10

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2 Answers

Inverse operation probably means take a quantity from one side of equation , and transferred it to the other side and change the sign ( move over).
 
    -a - 13 = -10
 
     -13 + 10= a
 
         -3 = a
 
 
-a-13=-10
 
Add a+10 to both sides:
 
-3 = a