Pencils

Emil has 23 pencils in a pencil case, 18 of which were broken. Emily 9 trims, 2 breaks, 4 trims and goes to school. When he returned from school, he has broken 5 pencils. How many pencils have trimmed at school?

Correct answer:

n =  2

Step-by-step explanation:

n=18−9+2−4−5=2

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