anonymous
  • anonymous
Solve using the addition principle t-7=18
Mathematics
chestercat
  • chestercat
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anonymous
  • anonymous
okay. lets see, t -7 =18 what should you add to t-7 to get t+0?
anonymous
  • anonymous
in other words, what do you add to -7 to make it 0?
anonymous
  • anonymous
u set it up like t-7 +7

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anonymous
  • anonymous
okay very good. so if you add 7 to the left hand side of the equation, you must add it to the right hand side also to make the equation equal. so t - 7+7 = 18+7
anonymous
  • anonymous
so the answer will be T=25
anonymous
  • anonymous
yes. that is right.
anonymous
  • anonymous
now what if a problem is 4=b-4
anonymous
  • anonymous
same thing
anonymous
  • anonymous
use the same principle. exactly. it is the same thing
anonymous
  • anonymous
in the earlier problem, you found out t = 25.
anonymous
  • anonymous
right
anonymous
  • anonymous
so this set up will be like 4+4 = b-4+4
anonymous
  • anonymous
your equation was t - 7 = 18 so what is t?. if you put t = 25, you get 25 minus 7 is 18. which is exactly right. similarly in your new problem, it is: some number b - 4 gives 4
anonymous
  • anonymous
right
anonymous
  • anonymous
the answer will be 8 = b
anonymous
  • anonymous
just put it in words. b-4 = 4 means " the number BEE minus the number 4, gives me a number 4". so what is BEE?
anonymous
  • anonymous
exactly. and you know b = 8 because 8 minus 4 is equal to 4.
anonymous
  • anonymous
oh k thank you
anonymous
  • anonymous
you are welcome

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