Answer: the first number is 28
the second number is 140
the third number is 128
Step-by-step explanation:
Let x represent the first number.
Let y represent the second number.
Let z represent the third number.
One number is 5 times a first number. This means that
y = 5x
A third number is 100 more than the first number. This means that
z = x + 100
If the sum of the three numbers is 296, it means that
x + 5x + x + 100 = 296
7x = 296 - 100
7x = 196
x = 28
y = 5x = 5 × 28
y = 140
z = x + 100 = 28 + 100
z = 128
