SOLUTION: the sum of two number is 28.if the second number is thrice the first ,what is the second number.

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Question 749368: the sum of two number is 28.if the second number is thrice the first ,what is the second number.
Answer by mykailao(6) About Me  (Show Source):
You can put this solution on YOUR website!
The sum is 28.
Let x = first no.
Let 3x = second no.
x + 3x = 28
4x = 28
x = 7
Answer:
First no. = x = 7
Second no. = 3x = 21