anonymous
  • anonymous
solve by the elimination method 0.3x - 0.2y=4 0.5x + 0.3y = 71/23
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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amistre64
  • amistre64
yikes!! thats scary :)
anonymous
  • anonymous
0.3x-0.2y=4 0.5x+0.3y=71/23 so, first you have to get rid of the y from both equations
anonymous
  • anonymous
right! i'm clueless, the fraction throws me off!

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anonymous
  • anonymous
It is simple: multiply both equations, so that the y members of both of them are eliminated when added so in your case, we can multiply the first equation by 3, to get 0.9x-0.6y=12 and now we need to multiply the second equation in such a way that when coresponding members of both of them are added, y is eliminated (equals zero) so, we have to multiply it by 2 to get 1x+0.6y=142/23
anonymous
  • anonymous
now, we have to add all coresponding members to eliminate y, so 0.9x-0.6y=12 + 1x+0.6y=142/23 _________________________ 1.9x+0=418/23 =1.9x=418/23
anonymous
  • anonymous
ok, i follow you so far ....
anonymous
  • anonymous
so, now lets solve for x 1.9x=418/23 23*1.9x=418 43.7x=418 x=418/43.7 x=9.56521
anonymous
  • anonymous
i have to solve it as a fraction, so i'm plugging in 418/43.7 to solve for y ....
anonymous
  • anonymous
now to get y we just take any equation, and substitute x into it, and solve for y 0.3x-0.2y=4 0.3*9.56521-0.2y=4 2.869565217-0.2y=4 -0.2y=4-2.869565217 -0.2y=1.130434 y=1.130434/-0.2 y=-5.65
anonymous
  • anonymous
if I helped in anyway, I would apreciate if you would fan me (reload this page, and click a blue Become a fan button near my name)
anonymous
  • anonymous
x~~9.56522, y~~-5.65217
anonymous
  • anonymous
yes, thats correct
anonymous
  • anonymous
what is y as a fraction?
anonymous
  • anonymous
that is y as a decimal
anonymous
  • anonymous
my answer has to be in the form of a fraction
anonymous
  • anonymous
1 Attachment
anonymous
  • anonymous
to get it as a fraction, just do same steps as I showed you, just keep pluging in fractions all the way from the beginning until now, and you can get a fraction
anonymous
  • anonymous
x=220/23
anonymous
  • anonymous
ok, thx! and i became a fan while you were working on my problem, thx!
anonymous
  • anonymous
y=-130/23
anonymous
  • anonymous
Got the fraction?
anonymous
  • anonymous
x=220/23 y=-130/23
anonymous
  • anonymous
great, thx!
anonymous
  • anonymous
You are welcome, and look at the plot that will help you understand
anonymous
  • anonymous
If you any more problems, you can send it my way, I will be happy to answer
anonymous
  • anonymous
great, thx for your help!

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