anonymous
  • anonymous
What values of x and y satisfy x − 3y = 4 and 2x + y = 7 simultaneously?
Linear Algebra
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
Loser66
  • Loser66
who will work? you or me?
anonymous
  • anonymous
its Solving Linear Systems Using Linear Combinations
anonymous
  • anonymous
idk how to work them out

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More answers

Loser66
  • Loser66
willing to work?
anonymous
  • anonymous
willing to work?...i dont understand
Loser66
  • Loser66
You don't know how to do, but if I guide and YOU are willing to work, we can work together to get the answer. If you don't want to work on it, OOOOOOOOOOOOOK, both us go to bed. hahahaha....
anonymous
  • anonymous
well yea im willing to work on it
Loser66
  • Loser66
ok, what is the fist equation?
anonymous
  • anonymous
x − 3y = 4?
Loser66
  • Loser66
yup, multiply both sides by 2, what do you get?
anonymous
  • anonymous
2x-3y=8
Loser66
  • Loser66
why -3y?
anonymous
  • anonymous
idk its jus there
Loser66
  • Loser66
hey, |dw:1433204298762:dw|
anonymous
  • anonymous
ooooooo ok so u distribute
Loser66
  • Loser66
yup, now what is the second equation?
anonymous
  • anonymous
2x + y = 7
Loser66
  • Loser66
ok, let them close to each other, and then subtract them, what do you have?|dw:1433204441490:dw|
anonymous
  • anonymous
-5y=7?
Loser66
  • Loser66
redo
anonymous
  • anonymous
idk how u would get it
Loser66
  • Loser66
You should be aware that I am ssssssssssso patient. I won't indulge you. You must work on it by yourself
Loser66
  • Loser66
|dw:1433204716278:dw|
Loser66
  • Loser66
=?
anonymous
  • anonymous
-7y-1
anonymous
  • anonymous
=1
Loser66
  • Loser66
-7y =1 okkkkkk
Loser66
  • Loser66
divide both sides by -7 , what do you get?
anonymous
  • anonymous
y=-7 maybe?
anonymous
  • anonymous
or positive 7
Loser66
  • Loser66
|dw:1433204871798:dw|
anonymous
  • anonymous
so when u divide 1 by a larger # it becomes a fraction?
Loser66
  • Loser66
now, replace y = -1/7 into the second equation, what do you get?
Loser66
  • Loser66
yup
Loser66
  • Loser66
|dw:1433205038742:dw|
anonymous
  • anonymous
|dw:1433205117411:dw|
Loser66
  • Loser66
+1/7 both sides.
anonymous
  • anonymous
-2x=-1?
Loser66
  • Loser66
|dw:1433205229223:dw|
Loser66
  • Loser66
|dw:1433205288926:dw|
anonymous
  • anonymous
tbh im kinda confused on this step
Loser66
  • Loser66
your ORIGINAL second equation is 2x +y = 7 replace y = -1/7 in, you have 2x-1/7 =7. Why confuse?
anonymous
  • anonymous
ok i get tht part
Loser66
  • Loser66
now, you have 2x = 50/7 divide both sides by 2, you get x. combine with y =-1/7 above, you have the solution. done
anonymous
  • anonymous
ok i get it thx i appreciate it

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