Question 237335

Hello, 
First, let's look at what you know. Both numbers equal 280. Let x be the first number and second number will be 400-3x. Now we can write out the equation:
x + 400 - 3x = 280  Combine like terms and subtract 400 from both sides. 
-2x = -120  Now get x alone:
x = 60

RJ Toftness
www.math-unlock.com