Algebra
# Linear Equations

The point \( (12, k)\) lies on the line \( y = 2x + 7\). What is the value of \(k\)?

If \(P=(a, 3)\) is a point on the line \[x+y-11=0,\] what is the value of \(a\)?

If \(P=(5, a)\) is a point on the line \[3x+y-22=0,\] what is the value of \(a\)?