Posted by daniel on Monday, May 26, 2008 at 3:37pm.
the sum of two numbers is the same as four times the smaller number.if twice the larger is decreased by the smaller,the result is 30.find the numbers

algebra  Reiny, Monday, May 26, 2008 at 4:28pm
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

algebra  tchrwill, Monday, May 26, 2008 at 4:30pm
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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