K.Binks
  • K.Binks
Solve 2x – 5y = 1 by the elimination method. 3x – 4y = -2 ?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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DanJS
  • DanJS
you want to multiply one of the equations or both by a constant value, so that when you add the equations together, a variable will sum to zero
DanJS
  • DanJS
for instance 2x and 3x multiply first equation by 3 will give you 6x multiply second equation by -2 giving -6x added they go to zero and x drops out
jdoe0001
  • jdoe0001
ditto \(\large \begin{array}{llcll} 2x-5y=1&{\color{brown}{ \times 4}}\implies &8x\cancel{-20y}=4\\ 3x-4y=-2&{\color{brown}{ \times -5}}\implies &-15x\cancel{+20y}=10 \\\hline\\ &&\square ?+\square ?=\square ? \end{array}\)

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K.Binks
  • K.Binks
-7x= 14 x=-2?
jdoe0001
  • jdoe0001
yeap
K.Binks
  • K.Binks
Thank you both!
jdoe0001
  • jdoe0001
yw

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