Question

Tom packed 12 identical textbooks and 8 identical notebooks ina box and found it's weight as 42 Ib. After he put 1 more textbook and 10 more notebooks in the same box, the total mass was 59.5 Ib.
Write a system of equations to determine the mass m in pounds, of one textbook and one notebook.

Solve the system of equations and find the mass of each.

Answer 1

You can find the answers by thes two systems of equation
(x is number of textbooks and y is number of notebooks)
$12x + 8y = 42 \\ 1x + 10y = 17.5 \\ or \\ 12x + 8y = 42 \\ 13x + 18y = 59.5$

so the answers are
$\\ x = \frac{5}{2 } \\ \\ y = \frac{3}{2}$





good luck