Question

Find the missing coordinate (?, -1) for 3x -4y=11

Answer 1

`(7)/(3)`

Explanation:

Substitute -1 in place of y in the equation:

`3x -4(-1)=11\\3x=7\\x=(7)/(3)`

Answer 2

(7/3, -1)

Explanation:

3x -4y=11

Let y = -1

3x -4(-1) = 11

3x +4 =11

Subtract 4 from each side

3x+4-4 = 11-4

3x = 7

Divide each side by 3

3x/3 = 7/3

x = 7/3