jimmy’s age is one year less than the sum of the ages of his siblings serena and tyler. which equation represents jimmy’s age?
a. look at the picturex represents tyler’s age, y represents serena’s age, and z represents jimmy’s age
b. look at the picturex represents jimmy’s age, y represents tyler’s age, and z represents serena’s age
c. look at the picturex represents serena’s age, y represents jimmy’s age, and z represents tyler’s age
d. look at the picturex represents jimmy’s age, y represents serena’s age, and z represents tyler’s age