The equation 5x -7 (x - 1) = -3x +b has exactly one solution

Two positive integers are 3 units apart on a number line. their product is 108. which equation can be used to solve for m, the greater integer? m(m – 3) = 108 m(m + 3) = 108 (m + 3)(m – 3) = 108 (m – 12)(m – 9) = 108

Yo need asap pls ! markin da brainiest too !

Lana's family entered a 5-kilometer race lana's average step length is about 0.5 meter how many steps will she need to take the finish