tatumlee
  • tatumlee
Solve the system of equations by substitution x=-4y x+5y=2 a.(-8,2) b.(8,-2) c.(2/9,-8/9) d.(-12,3) How do I do this problem?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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pooja195
  • pooja195
It tells you the vale of x right ? So just plug in the value of x into equation 2 -4y+5y=2 Now solve the equation for y tell me what you get
pooja195
  • pooja195
Ye solve for y -4+5=?
tatumlee
  • tatumlee
1

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pooja195
  • pooja195
Ok so 1y=2 Now divide both sides by 1 2/1=?
tatumlee
  • tatumlee
it would just be 2 i think?
pooja195
  • pooja195
Good so y=2 Now to solve for x... Now that we know the value of y we can plug in 2 (into equation 1) to figure out the x value -4 x 2 = ?
tatumlee
  • tatumlee
so -8?
pooja195
  • pooja195
Yes so x=-8 y=2 which coordinate matches the answer?
tatumlee
  • tatumlee
so the answer is a? and what do you mean?
pooja195
  • pooja195
A is correct :)
tatumlee
  • tatumlee
Thanks again!
pooja195
  • pooja195
:)

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