SOLUTION: use the method of substitution to solve the system of linear equations. 2x-y=4 9x-4y=19 The solution is ______ Please help me solve this.

Algebra ->  Coordinate Systems and Linear Equations -> SOLUTION: use the method of substitution to solve the system of linear equations. 2x-y=4 9x-4y=19 The solution is ______ Please help me solve this.       Log On


   

Question 655525: use the method of substitution to solve the system of linear equations.
2x-y=4
9x-4y=19
The solution is ______
Please help me solve this.
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
2x-y=4

-y=4-2x

-y = -2x + 4

y = 2x - 4


9x - 4y = 19

9x - 4(2x - 4) = 19

9x - 8x + 16 = 19

x + 16 = 19

x = 19 - 16

x = 3

Now that you have the solution for x, use this to find the solution for y.