SOLUTION: One number is 7 times a first number. A third number is 100 more than the first number. If the sum of the three numbers is 784​, find the numbers.

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Question 1055570: One number is 7 times a first number. A third number is 100 more than the first number. If the sum of the three numbers is 784​, find the numbers.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
B=7A
C=100%2BA
A%2BB%2BC=784
Substituting,
A%2B%287A%29%2B%28100%2BA%29=784
9A=684
A=76
So then,
B=7%2876%29
B=532
and
C=100%2B76
C=176