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#NAME?
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2 votes
-7=21+x help please thankyou

User Ezio
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2 Answers

6 votes
Subtract 21 on both sides.

-7-21=21-21+x
-7-21=x
x=-28

User Leyvi
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7.5k points
4 votes
move the 21 to the other side and change the sign

-7-21=x
x=-28

hope this helps
User Miguel Ferreira
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6.9k points
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