anonymous
  • anonymous
need help solving -108=-18a
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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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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