Question 103256: Translate to a system of equations and solve:
The sum of two numbers is 30. Their difference is 40. Find the numbers
Answer by HyperBrain(694)   (Show Source):
You can put this solution on YOUR website! Let x= the first no.
y= the other no.
(1)x+y=30
(2)x-y=40
From (2),
x=y+40, substituting this to (1),
y+40+y=30
2y+40=30
2y=-10
y=-5
Solving for x,
x-5=30
x=35
Therefore, the 2 nos. are 35 and -5
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