Difference between revisions of "2010 AMC 12B Problems/Problem 5"
(Created page with '== Problem 5 == Lucky Larry's teacher asked him to substitute numbers for <math>a</math>, <math>b</math>, <math>c</math>, <math>d</math>, and <math>e</math> in the expression <ma…') |
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<cmath>-8 + e = -2 - e</cmath> | <cmath>-8 + e = -2 - e</cmath> | ||
<cmath>2e = 6</cmath> | <cmath>2e = 6</cmath> | ||
− | <cmath>e = 3 | + | <cmath>e = 3 \;\;(D)</cmath> |
− | + | ||
== See also == | == See also == | ||
{{AMC12 box|year=2010|num-b=12|num-a=14|ab=B}} | {{AMC12 box|year=2010|num-b=12|num-a=14|ab=B}} |
Revision as of 18:46, 9 July 2010
Problem 5
Lucky Larry's teacher asked him to substitute numbers for ,
,
,
, and
in the expression
and evaluate the result. Larry ignored the parenthese but added and subtracted correctly and obtained the correct result by coincidence. The number Larry sustitued for
,
,
, and
were
,
,
, and
, respectively. What number did Larry substitude for
?
Solution
We simply plug in the numbers
See also
2010 AMC 12B (Problems • Answer Key • Resources) | |
Preceded by Problem 12 |
Followed by Problem 14 |
1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 • 11 • 12 • 13 • 14 • 15 • 16 • 17 • 18 • 19 • 20 • 21 • 22 • 23 • 24 • 25 | |
All AMC 12 Problems and Solutions |