anonymous
  • anonymous
Solve, using the substitution method. 4x + 2y = 11 x – 2 = – 2y
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
Is \[2y=11-4x\] Right?
Potatoes.ramu
  • Potatoes.ramu
Multiply the second equation by 2
Potatoes.ramu
  • Potatoes.ramu
and then subtract it from the first

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More answers

anonymous
  • anonymous
Ok, so \[2x-4=-4y?\]
Potatoes.ramu
  • Potatoes.ramu
Wait.. actually multiply the second equation by 4. That way you eliminate the x term
anonymous
  • anonymous
\[4x-8=-8y\]
anonymous
  • anonymous
How would I subtract it from the first equation? X becomes eliminated than what?
anonymous
  • anonymous
@hartnn
Potatoes.ramu
  • Potatoes.ramu
When x is eliminated, you can find the y term
hartnn
  • hartnn
substitution method. (not elimination method) 4x + 2y = 11 x – 2 = – 2y (find 'x' from here, by adding 2 on both sides)
Potatoes.ramu
  • Potatoes.ramu
Once you find the y term, you can substitute it in any of the above equations, and then you get x.
anonymous
  • anonymous
x=y?
anonymous
  • anonymous
So 6y=11?
Potatoes.ramu
  • Potatoes.ramu
@hartnn you'll still have the y term
hartnn
  • hartnn
x – 2 = – 2y x = 2-2y plug this in 1st equation 4(2-2y) +2y =11 simplify and get y
hartnn
  • hartnn
ask if you don't get that ^
Potatoes.ramu
  • Potatoes.ramu
@hartnn , but can't you solve it using elimination as well?
anonymous
  • anonymous
8-8y+2y=11
anonymous
  • anonymous
-10y=3?
hartnn
  • hartnn
the system can be solved by elimination method, but since the question specifically asks for substitution, we need to use substitution
hartnn
  • hartnn
-8y +2y = ... ?
anonymous
  • anonymous
6y
anonymous
  • anonymous
8-6y=11 -6y=3 y=-1/2
hartnn
  • hartnn
YES :)
hartnn
  • hartnn
now find x
anonymous
  • anonymous
Okkkkk :)
anonymous
  • anonymous
x=3
anonymous
  • anonymous
So its this bit.ly/1ewUix3
hartnn
  • hartnn
\(\huge \checkmark \)
anonymous
  • anonymous
(3,-1/2) Right?
hartnn
  • hartnn
yes, it is correct.
anonymous
  • anonymous
Thanks! Should I give the medal to potatoes or you? He tried... but you helped
hartnn
  • hartnn
i'm not here for medals. you understand thats my medal :)
anonymous
  • anonymous
:D
Potatoes.ramu
  • Potatoes.ramu
Also.. I'm a she :) And my method was wrong for this problem! Sorry!

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