The value of the y-coordinate is 2
Solution:
The system of equations given are:
x + 2y = 9 ------ eqn 1
x - y = 3 ------ eqn 2
To find: value of y - coordinate
We can solve the above system of equations by substitution method
From eqn 2,
x = 3 + y ------ eqn 3
Substitute eqn 3 in eqn 1
3 + y + 2y = 9
Combine the like terms
3 + 3y = 9
3y = 9 - 3
On solving,
3y = 6
y = 2
Thus the value of the y-coordinate is 2
