6+ 5x + 14 = 8
i need i don’t understand multi step equations

How to do this , and can some one explain

In the diagram, be and ad pass throughthe center of circle o, and the area ofsector aoc is 47.45 square units. what isthe area of sector boc? use the value =3.14, and round your answer to two decimalplaces.22.33 square units25.12 square units

What are the solutions of the following system? y=-2x^2 y=x-2