SOLUTION: Given the system of equations, what is the x-coordinate of the solution? y = 3 - x 3x + 4y = 1

Algebra ->  Matrices-and-determiminant -> SOLUTION: Given the system of equations, what is the x-coordinate of the solution? y = 3 - x 3x + 4y = 1      Log On


   

Question 998061: Given the system of equations, what is the x-coordinate of the solution?
y = 3 - x
3x + 4y = 1
Answer by fractalier(6550) About Me  (Show Source):
You can put this solution on YOUR website!
Given
y = 3 - x
3x + 4y = 1
Since we need x, we can substitute for y in the second equation and get
3x + 4(3 - x) = 1
3x + 12 - 4x = 1
-x + 12 = 1
-x = -11
x = 11