How to find the break even point using algebra

What dimensions can créate more than one triangle ?

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

In a rectangle klmn, km = 6x + 16 and ln = 49. find the value of x