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 = (5)/(2 ) \\ \\ y = (3)/(2) \\`





good luck