anonymous
  • anonymous
What should be added to both sides of this equation to solve for the variable? 7 = -13 + d help me please.
Mathematics
schrodinger
  • schrodinger
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anonymous
  • anonymous
look at the sign in front of the constant (-13) how do you make it 0 do you add or subtract 13
anonymous
  • anonymous
subtract
anonymous
  • anonymous
7 = -13 +d +13 +13 d=21

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anonymous
  • anonymous
if you subtract 13 form -13 you get -26not 0 so you need to add 13
anonymous
  • anonymous
so after you add what do you do next
anonymous
  • anonymous
you get solution...go here http://www.twiddla.com/536745
anonymous
  • anonymous
was it 7 or 1

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