SOLUTION: the sum joshua and alyssa's age is 36. josh is 4 years younger then alyssa, how old are they let x rep. josh let y rep. alyssa

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Question 978625: the sum joshua and alyssa's age is 36. josh is 4 years younger then alyssa, how old are they

let x rep. josh
let y rep. alyssa
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
x+y=36
y=x+4
substitute for y
x+x+4=36
2x+4=36, collected terms, now subtract 4 from each side.
2x=32 , now divide both sides by 2.
x=16
x+4 =20
Josh is 16
Alyssa is 20.