Use addition or substitution to solve this problem. Mario earned three times as much money last year as his wife Elena. The total amount that the two earned was $11,000. How much money did Elena earn?

Question

anonymous · Answer

let mario's wife earn x amount of money.
then, mario earn 3x amount of money. 
so, x+3x=11000.
Now you can figure it out the answer.

anonymous · Answer

let x=elena's income

then, mario earned 3x
total earned is11,000
x+3x=11,000
4x=11,000
x=?

anonymous · Answer

yuk got it right