4x + 2 = 4
If x satisfies the equation above, what is the value of 2x + 1 ?

x-1/2a=0 If x = 1 in the equation above, what is the value of a ?

2x − y = 8 x + 2y = 4 For the system of equations above, what is the value of x + y ?

3x-6=5x-2 Based on the equation above, what is the value of 2x-4?

2ax − 15 = 3(x + 5) + 5(x − 1) In the equation above, a is a constant. If no value of x satisfies the equation, what is the value of a ?

x+y=-6 y-4x=4 If the ordered pair (x, y) satisfies the system of equations shown above, what is the value of xy?

y=x^2-4x+4 y=4-x If the ordered pair (x, y) satisfies the system of equations above, what is one possible value of x ?

x^(2)-y^(2)=18 y=x-4 In the above system of the equations, what is the value of x+y?

y=x^2-4,x+y=2 Based on the system of equations above , what is the minimum value of the product xy ?

1/2y=4 x-1/2y=2 The system of equations above the solution (x,y). What is the value of x?