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#NAME?
asked
Aug 4, 2018
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-7=21+x help please thankyou
Mathematics
high-school
Ezio
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6
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Subtract 21 on both sides.
-7-21=21-21+x
-7-21=x
x=-28
Leyvi
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Aug 5, 2018
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Leyvi
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4
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move the 21 to the other side and change the sign
-7-21=x
x=-28
hope this helps
Miguel Ferreira
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Aug 8, 2018
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Miguel Ferreira
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