For each equation below, determine whether the number shown in bold is a solution to the equation. if the number is not a solution, then find the solution. show your work.
a. x + 17 = -3; -20 b. y - 12 = 14; 10
part i: plug each answer into the equation for the variable. (2 points; 1 point each)

part ii: perform the calculation on the left side of the equation. (2 points; 1 point each)

part iii: determine if the number given is a correct solution. if the number is not a solution, find the correct solution. (4 points; 2 points each)