anonymous
  • anonymous
need help solving -108=-18a
Mathematics
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anonymous
  • anonymous
need help solving -108=-18a
Mathematics
jamiebookeater
  • jamiebookeater
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At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

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anonymous
  • anonymous
Since u need to cancel out -18 to get a alone the opposite of multiplication is division so divide -18 out on each side of the equal sign
anonymous
  • anonymous
All you need to do is divide -108 by -18, since the opposite of multiplication is division =)
anonymous
  • anonymous
a=6

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anonymous
  • anonymous
Yes it does. Good job!
anonymous
  • anonymous
thanks... 8-2=x+5
anonymous
  • anonymous
Opposite of addition is subtraction
anonymous
  • anonymous
am I subtracting by 5
anonymous
  • anonymous
Yes
anonymous
  • anonymous
So the equation becomes 8-2-5 = x
anonymous
  • anonymous
11x
anonymous
  • anonymous
Not quite
anonymous
  • anonymous
8-2 = 6 6-5 = ?
anonymous
  • anonymous
1
anonymous
  • anonymous
x=1
anonymous
  • anonymous
Yes!
anonymous
  • anonymous
how do I check answer
anonymous
  • anonymous
You substitute x for the answer you got
anonymous
  • anonymous
For example 8-2 = x+ 5 and you got x = 1 To check you answer you Plug in x 8-2 = 1 + 5
anonymous
  • anonymous
thanks
anonymous
  • anonymous
No problem
anonymous
  • anonymous
1/5x=-4/5
anonymous
  • anonymous
need help with 1/5x=4/5
anonymous
  • anonymous
Is the 1/5 next to the x or is it 1 over 5x
anonymous
  • anonymous
next to the x
anonymous
  • anonymous
In this case to cancel out the fraction u multiply by the reciprocal. Which is a fancy word for flipping the fraction. So 1/5 becomes 5/1 which is also 5
anonymous
  • anonymous
So the equation becomes x = 4/5(5/1)
anonymous
  • anonymous
do I have to multiply
anonymous
  • anonymous
Yes
anonymous
  • anonymous
20/5
anonymous
  • anonymous
x=20/5
anonymous
  • anonymous
Yes, now simplify the fraction
anonymous
  • anonymous
x=4
anonymous
  • anonymous
Yes
anonymous
  • anonymous
thank you

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