Double my number add 4 subtract my number and subtract three my number plus one

How can you decide witch operations to use to slice a two step equation

True or false? a circle could be circumscribed about the quadrilateral below.

The linear combination method is applied to a system of equations as shown. 4(.25x + .5y = 3.75) → x + 2y = 15 (4x – 8y = 12) → x – 2y = 3 2x = 18 what is the solution of the system of equations? (1,2) (3,9) (5,5) (9,3)