How do i calculate the value of x for both of these questions? i'm so confused.

X-10/4 when x = –18 a 7 b –2 c –7 d 2

Johnny rode his bike to a friends house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was unable to play. what was his displacement for the total bike ride trip? what could you use as a reference point ? show the steps to solve this problem.

Jeremy wants to determine the number of solutions for the equation below without actually solving the equation. which method should jeremy use?