SOLUTION: May you help me with this problem: 3x+7y=6 2x+9y=4 The instructions are to use linear combinations to solve the linear system. Then check your solution. Thank you for time.

Algebra ->  Coordinate Systems and Linear Equations -> SOLUTION: May you help me with this problem: 3x+7y=6 2x+9y=4 The instructions are to use linear combinations to solve the linear system. Then check your solution. Thank you for time.      Log On


   



Question 402823: May you help me with this problem:
3x+7y=6
2x+9y=4
The instructions are to use linear combinations to solve the linear system.
Then check your solution. Thank you for time.

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Do it like this one.
------------
3j+5k=19
j-2k=-1
------------
Multiply the 2nd eqn by 3 to make the coefficients equal
3j+5k=19
3j-6k=-3
---------- Subtract
-k = 22
k = 22
-------
j - 2k = -1
j -44 = -1
j = 43