SOLUTION: The sum of 2 numbers is 115. Their difference is 5. What are the numbers? How do I solve this problem?

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Question 941374: The sum of 2 numbers is 115. Their difference is 5. What are the numbers?
How do I solve this problem?
Answer by srinivas.g(540) About Me  (Show Source):
You can put this solution on YOUR website!
let x,y be the two numbers
their sum id 115
x+y= 115 ........eq(1)
their difference is 5
x-y = 5.............eq(2)
we need to solve the both the equation
Solved by pluggable solver: SOLVE linear system by SUBSTITUTION
Solve:
+system%28+%0D%0A++++1%5Cx+%2B+1%5Cy+=+115%2C%0D%0A++++1%5Cx+%2B+-1%5Cy+=+5+%29%0D%0A++We'll use substitution. After moving 1*y to the right, we get:
1%2Ax+=+115+-+1%2Ay, or x+=+115%2F1+-+1%2Ay%2F1. Substitute that
into another equation:
1%2A%28115%2F1+-+1%2Ay%2F1%29+%2B+-1%5Cy+=+5 and simplify: So, we know that y=55. Since x+=+115%2F1+-+1%2Ay%2F1, x=60.

Answer: system%28+x=60%2C+y=55+%29.