Answer: choice a
Step-by-step explanation:
Set up your variables. For this question lets use x, y, and z.
the equations will be . .
x + y + z = 165
x = 2y - 65
z = y -10
If we now substitude the equations for x and z with the first equation we cans solve for y. Hence the equation will be . . .
2y - 65 + y + y -10 = 165
y = 60
then substitude the equations for x and z with y.
your answer should match choice a.
