How do you solve 2x-31= -9x+24 ?

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

Ten members of balin's soccer team ran warm ups for practice. each member ran the same distance. their combined distance was 5/6 of a mile. to find the distance that each member ran, balin wrote the expression below.

Aadc is formed by reflecting aabc across line segment ac, as shown in the figure. if the length of ac is 4 units, the area of aadc is square units.