Homework Help: math

Posted by jaime on Monday, October 1, 2012 at 1:59am.

Roberto and Luisa Barron Lopez each work full time jobs, and Luisa's mother, Carmena, collects a monthly pension of $628. Between the three of them, their total household income is $4238 each month. If Luisa earns $1772, how much does Roberto earn each month?

math - Steve, Monday, October 1, 2012 at 5:07am
first, between involves two
among involves more than teo

l = 1772
c = 628

r + 1772 + 628 = 4238
r = 1838

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