Finding Radius and Diameter

If the radius of a circle is 19, what is the diameter?

If the diameter of a circle is 20, what is the radius?

If the radius of a circle is 15, what is the diameter?

If the radius of a circle is 5.5, what is the diameter?

If the radius of a circle is 12.6, what is the diameter?

If the diameter of a circle is 21, what is the radius?

If the diamter of a circle is 1/2, what is the radius?

If the radius of a circle is 12.9, what is the diameter?

If the diameter of a circle is 56, what is the radius?

If the radius of a circle is 19.8, what is the diameter?

If the diameter of a circle is 12 4/5, what is the radius?

If the radius of a circle is 93/4, what is the diameter?

If the radius of a circle is 7.93, what is the diameter?

If the diameter of a circle is 234.6, what is the radius?

If the radius of a circle is 16.12, what is the diameter?

Solve.

x - 4 = -4

Solve.

3x = -9

Solve.

5 = x - (-2)