Answer:
Tom's height = x = 64 inches
Sally's height = y = 60 inches
Step-by-step explanation:
Let us represent
Tom's height = x
Sally's height = y
Tom is 4 inches taller than Sally
x = y + 4
Together their heights equal 124 inches
x + y = 124
We substitute y + 4 for x
y + 4 + y = 124
2y + 4 = 124
Collect like terms
2y = 124 - 4
2y = 120
y = 120/2
y = 60
Solving for x
x = y + 4
x = 60 + 4
x = 64
Therefore,
Tom's height = x = 64 inches
Sally's height = y = 60 inches
