Katie and Tom are selling pens. Katie makes a dollar for every two pens she sells and has $5 that she made yesterday. Tom makes
$2 for every three pens he sells and he owes the teacher $4 from yesterday. After selling pens all day they have the same amount of money. Using the equation below, how many pens did they sell?
1 answer:
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x² - x - 12 ≠ 0
x² - 4x + 3x - 12 ≠ 0
x (x - 4) + 3 (x - 4) ≠ 0
(x + 3)(x - 4) ≠ 0
x ≠ -3 or x ≠ 4
(B)