anonymous
  • anonymous
Help please? Solve by the elimination method. 4a + 4b =8 -4a + b =37 Is there a solution (type an ordered pair), infinitely many solutions, or no solutions?
Mathematics
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
4(a+b) = 8 a+b = 4 subtract in second equation: -5a = 33 a = 33/-5 Therefore b = 8.6
anonymous
  • anonymous
4a + 4b =8 + -4a + b =37 ------------------ 5b = 45 --- --- 5 5 ------------------ b = 9
anonymous
  • anonymous
how do I type an ordered pair for these equations?

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anonymous
  • anonymous
There must be a few solutions
anonymous
  • anonymous
Well that one I got incorrect, so I need to do a similar excercise, what i'm looking for is to be shown how to do these step by step so I can learn the process myself, can you help me? Here is the next equation.. 4a + 5b =13 -4a +b =17
anonymous
  • anonymous
b=9 4a + 4b =8 4a+4(9)=8 4a=-28 a=-7 Ordered pair is (-7,9)
anonymous
  • anonymous
Can you help me rework the next equation that I listed? 4a + 5b =13 -4a +b =17
anonymous
  • anonymous
4a + 5b =13 + -4a +b =17 ----------------- 6b=30 b=5 4a+5(5)=13 4a+25=13 4a=-12 a=-3 (-3,5)
anonymous
  • anonymous
Thank you Grazes & Violy. I appreciate the help.
anonymous
  • anonymous
np.

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