Math
posted by Anonymous
the sum of two numbers is 30. the difference of their squares is 180. find the two numbers by elimination method

Jichu
Let x = one number and y = second number
Hint:
Equation #1: x+y=30
Equation #2: x^2  y^2 = 180
x = 30y
(30y)^2y^2=180
y^260y+900y^2=180
60y=720
y=12
x = 3012
x=18
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