Question 755489: 4x + 7y = -16
6x - y = -24
solve using elimination method
Answer by pragya.ban@gmail.com(32)   (Show Source):
You can put this solution on YOUR website! 4x + 7y = -16
6x - y = -24
The elimination method basically targets one of the variables and eliminates it. For this problem, let's eliminate y. To do so we need to multiply the second equation by 7.
4x + 7y = -16
42x - 7y = -168
We multiplied by 7 because we want the y's to cancel out. For this to happen you need to have the same value but just negatives of each other. Now the next step is to add the equations:
4x + 7y = -16
+
42x - 7y = -168
______________
46x = -184
Now solve like normal and you should -4 for x. Now just replace x with -4 in the equations and you can find y.
Hope this helps!
|
|
|
