SOLUTION: The combined weight of an older sister and her baby brother is 74 pounds. The weight of the older sister is 2 pounds less than 3 times the baby brother's weight. Write and solve a

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: The combined weight of an older sister and her baby brother is 74 pounds. The weight of the older sister is 2 pounds less than 3 times the baby brother's weight. Write and solve a       Log On


   

Question 1070428: The combined weight of an older sister and her baby brother is 74 pounds. The weight of the older sister is 2 pounds less than 3 times the baby brother's weight. Write and solve a linear equation that will find the weight of each sibling.
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
x, sister,
y, baby brother
system%28x%2By=74%2Cx=-2%2B3y%29

%283y-2%29%2By=74
4y-2=74
4y=76
highlight%28y=19%29-----brother

highlight%28x=55%29------sister