For this case, the first thing we must do is define a variable.
x: number of newspapers sold per week.
We now write the equation for the total of newspapers.
We have then:
[tex]0.10 (2x) + 0.25x = 13.95
[/tex]
Rewriting we have:
[tex]0.20x + 0.25x = 13.95
0.45x = 13.95
x = 13.95 / 0.45
x = 31[/tex]
For Mattthew we have:
[tex]2x = 2 (31) = 62
[/tex]
For his brother:
[tex]x = 31
[/tex]
Answer:
each boy delivers each week about:
Mattthew: 62
His brother: 31
