How do you solve the following system?: x+y=4, 2x -5y=7
1 Answer
Feb 5, 2016
Explanation:
a)
b)
First multiply a) by -2:
a)
b)
Then add a) and b)
Replace y in a)
a)
b)
First multiply a) by -2:
a)
b)
Then add a) and b)
Replace y in a)