How do solve the following linear system?: 3x – 4y = 7, x-y=2 ?
1 Answer
May 16, 2018
Explanation:
Given
[1]
[2]
There are several ways to solve this but since it was asked under "Systems Using Substitution", we will approach it that way:
Rearrange [2] into an equation in terms of
[3]
Now substitute
[4]
Expanding and simplifying [4]
[5]
or
[6]
Now substitute
[7]
Simplifying:
[8]