Answer:
y = 3
Explanation:
Pre-Solving
We are given the following equation:
4x + 5y - 7 = 0
We want to find the y value of the ordered pair (-2,?), which is our solution. We already know that the value of x in the solution is -2.
To do this, we should substitute -2 as x into the equation, as then the only variable that will be left will be y.
Solving
Substitute -2 as x.
4(-2) + 5y - 7 = 0
-8 + 5y - 7 = 0
-15 + 5y = 0
Add 15 to both sides.
5y = 15
Divide both sides by 5.
y = 3
This is the value of the missing coordinate.