SOLUTION: I am not sure if this is solved by substitution, or elimination
4x - 6y = -14
x + 4y = 13
Algebra.Com
Question 78377: I am not sure if this is solved by substitution, or elimination
4x - 6y = -14
x + 4y = 13
Answer by dolly(163) (Show Source): You can put this solution on YOUR website!
Solution by substitution:
x + 4y = 13
==> x = 13 -4y ------------------(i)
Plugging in this value of x in the first equation, we get,
4(13-4y) - 6y = -14
==> 52 - 16y - 6y = -14
==> 52 - 22y = -14
adding -52 to both sides,
-22y = -14 -52
==> -22y = -66
==> -22y/22 = -66/22
==> y = 3
Putting this value in (i), x = 13 -4(3)
= 13 - 12
= 1
Thus x = 1 and y = 3
Solution by elimination:
4x - 6y = -14----------------------(1)
x + 4y = 13 ----------------------(2)
==> 4x + 16y = 52 -----------(2) x 4
4x - 6y = - 14 -------------(1)
Subtracting the two equations we get,
16y + 6y = 52 + 14
==> 22y = 66
==> 22y/22= 66/22
==> y = 3
Plugging in this in (2), x = 13 - 4y
= 13 - 4(3)
= 13 - 12
= 1
Thus x = 1, y = 3
RELATED QUESTIONS
Think i did them right but 2 & 3 are I get no solution and want to make sure I am not... (answered by jim_thompson5910)
Solve by substitution or elimination method:
4x – 5y = 14... (answered by solver91311)
Solve the system by substitution:
-3x+6y=21
2x-4y=14
I have tryed completing this by (answered by jim_thompson5910)
x-4y=-13... (answered by mananth)
Solve by either elimination, substitution or Crammer's Rule.
I am not sure how to do... (answered by stanbon)
How am I suppose to answer this
x=12y-14
3y+2x=26
This is using substitution or... (answered by Alan3354)
I am stuck,two step equations -4x+10-38 I solved this one ,but am not sure if I am doing (answered by solver91311)
Use the system to answer the question
{x+3y=6}
{4x + 6y = -6}
Note: The problem... (answered by stanbon)
A 5- pound mixture of peanuts and almonds sells for $15. If the peanuts sell for $1.50 a (answered by scott8148)