X-2(12 x 1/2)=2(4-2x)+20

The "X" in between the 12 and 1/2 means multiply.

Find the sum of the measure of the interior angles of a polygon of 9 sides ; of 32 sides

To solve the system of equations below, grace isolated the variable y in the first equation and then substituted into the second equation. what was the resulting equation? 3y=12x x^2/4+y^2/9=1

The measurement of one angle of a right triangle is 42° what is the measurement of the third angle? (there is no picture)