Remmi wrote the equation of the line mc021-1.jpg he solved for x and got mc021-2.jpg which of the following is an equivalent equation for x?

The perimeter of a rectangular lot of land is 436 ft. this includes an easement of x feet of uniform width inside the lot on which no building can be done. if the buildable area is 122 ft by 60 ft, determine the width of the easement. select one: a. 9 feet b. 18 feet c. 4.5 feet d. 7 feet

Can someone show me step by step how to do this?

Solve the system of equations. x=-2y+1 and x+2y=9. show work