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The sum of two numbers is 12.43 and their difference is 117.77. What are the numbers?
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8 votes
The sum of two numbers is 12.43 and their
difference is 117.77. What are the numbers?

User Toontje
by
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1 Answer

6 votes
x+y = -12.43
...
x-y = 117.77
..
add the two equations
2x=105.34
/2
x=52.67
...
plug value of x in first equation
52.67+y=-12.43
-52.67
y=-12.43-52.67
y = -65.10
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