Solve this equation for x
0.5(5-7x)=8-(4x+6)

How do you use the elimination method for this question? explain, because i really want to understand!

When a 757 passenger jet begins its descent to the ronald reagan national airport in washington, d. c., it is 3900 feet from the ground. its angle of descent is 6 degrees. how far must the plane fly to reach the run way? a. 37,106 ft b. 37,310.4 ft c. 23,456.6 ft d 2,492.7 ft

Arectangular yard has area 96 square feet. if the width of the yard is 4 feet less than the length