What values of x and y satisfy x − 3y = 4 and 2x + y = 7 simultaneously?

A) $$x=\frac{ 1 }{ 7 }~and~x=\frac{ 25 }{ 7 }$$

B) $$x=\frac{ 25 }{ 7 } ~and~ y=−\frac{ 1 }{ 7 }$$

C) x=7 and y=1

D) x=3 and y=1

@kelliegirl33 @agent0smith @AllTehMaffs @jdoe0001 @RICARDOismyfirstname @shrutipande9

Question

What values of x and y satisfy x − 3y = 4 and 2x + y = 7 simultaneously?

A) $$x=\frac{ 1 }{ 7 }~and~x=\frac{ 25 }{ 7 }$$

B) $$x=\frac{ 25 }{ 7 } ~and~ y=−\frac{ 1 }{ 7 }$$

C) x=7 and y=1

D) x=3 and  y=1

@kelliegirl33 @agent0smith @AllTehMaffs @jdoe0001 @RICARDOismyfirstname @shrutipande9

anonymous · Answer

these are a pain in the butt.....we are going to have to sub in your answer choices to see which one satisfies both equations...

anonymous · Answer

lets just solve it and see if that is an answer choice....hold on

anonymous · Answer

If you just want the answer then its option 'b'

anonymous · Answer

x - 3y = 4 -->(-2)
2x + y = 7
--------------
-2x + 6y = -8
2x + y = 7
-------------
7y = -1
y = -1/7

x - 3y = 4
x - 3(-1/7) = 4
x + 3/7 = 4
x = 4 - 3/7
x = 28/7 - 3/7
x = 25/7

found it.....x = 25/7 and y = -1/7

anonymous · Answer

Thanks :)