anonymous
  • anonymous
Solve, using the substitution method. y – 2x = 8 16 + 4x = 2y
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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hartnn
  • hartnn
y-2x = 8 add 2x on both sides, what u get ?
anonymous
  • anonymous
y=9+2y
hartnn
  • hartnn
now plug in y= 8+2x in 2nd equation

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anonymous
  • anonymous
I thought of doing -2x=8-y
hartnn
  • hartnn
that can work, but things will get complicated soon.
anonymous
  • anonymous
16+4x=2(8+2x)
anonymous
  • anonymous
I see... I will use the way u told me than
hartnn
  • hartnn
yes, simplify 2(8+2x)
anonymous
  • anonymous
16+4x=16+4x
anonymous
  • anonymous
O.O IMPOSSIBLE
hartnn
  • hartnn
correct. now think logically, when is that true
hartnn
  • hartnn
not impossible its like 0=0
anonymous
  • anonymous
S0 infinite number of solutions
hartnn
  • hartnn
you take any value of x or y 16+4x will always be = 16+4x so, yes, infinite solutions :)
anonymous
  • anonymous
yay! Thanks so much
mathmale
  • mathmale
Note how one of the given equations is a multiple of the other given equation. That's all the info you need to decide "infinitely many solutions."
anonymous
  • anonymous
I see, Thanks :)
mathmale
  • mathmale
:)

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