Posted by daniel on Monday, May 26, 2008 at 3:37pm.
let x be the smaller, and y the larger
x+y = 4x
2y - x = 30
solve the two equations.
I would take the first down to y = 3x and use substitution
From the first statement, x + y = 4x, or y = 3x, x being the smaller number.
From the second statement, 2y - x = 30.
Substitute the first into the second and you are on your way.
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