Question 108337
Two numbers have a sum of 22. Their difference is 4. what are the two numbers? 
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Let the two numbers be x and y.
EQUATIONS:
x+y = 22
x-y = 4
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Add the two equations to get:
2x = 26
Divide both sides by 2 to get 
x = 13
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Substitute that value into x+y=22 to solve for y:
13+y = 22
y = 9
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The numbers are x = 13 and y = 9
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Cheers,
Stan H.