Question

Write an equation with a variable AND solve it. Mario read 72 pages of his book in class and 13 pages per night, n, until he read 163 pages. How many nights did he read?
Equation:
Answer:

Answer 1

9514 1404 393

Answer:

  72 +13n = 163

  7 nights

Step-by-step explanation:

At 13 pages per night, Mario will read 13n pages in n nights. That plus the pages already read will total 163:

  equation: 13n +72 = 163

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To solve this, we can subtract 72, then divide by the coefficient of n.

  13n = 91 . . . . . . subtract 72 from both sides

  n = 7 . . . . . . . . divide both sides by n

Mario read 7 nights.