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2010 AMC 10B Problem 9

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2010 AMC 10B Problem 9AMC 10 Step by Step

Name: Date: September 13, 2026

Algebraic Manipulation · difficulty 2 of 5 · about 2 min · position P1-10

Lucky Larry's teacher asked him to substitute numbers for $a$ , $b$ , $c$ , $d$ , and $e$ in the expression $a-(b-(c-(d+e)))$ and evaluate the result. Larry ignored the parentheses but added and subtracted correctly and obtained the correct result by coincidence. The numbers Larry substituted for $a$ , $b$ , $c$ , and $d$ were $1$ , $2$ , $3$ , and $4$ , respectively. What number did Larry substitute for $e$ ?

A)
$-5$
B)
$-3$
C)
$0$
D)
$3$
E)
$5$

2010 AMC 10B Problem 9

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