deziroxy88
deziroxy88 deziroxy88
  • 10-04-2017
  • Mathematics
contestada

-7=21+x help please thankyou

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AnimeBrainly
AnimeBrainly AnimeBrainly
  • 10-04-2017
move the 21 to the other side and change the sign

-7-21=x
x=-28

hope this helps
Answer Link
Аноним Аноним
  • 10-04-2017
Subtract 21 on both sides.

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

Answer Link

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