Question

Pls help, i really need help with. i will mark brainliest with the best/correct answer!!!

Answer 1

Answer:

Number 1 is 12.

Step-by-step explanation:

{Solve by cross multiplication}

17 • x = 3 • (80 - x)

{Multiply 3 by distribution,}

17x = 240 - 3x

{Add 3x to both sides of the equation,}

20x = 240

{Divide through out by 20,}

20r/20 = 240/20

x = 12

Thus there were 12 pens :)