Help w/ study guide: If B=5, C=2, A=B+3(4-C), find A

[grieco]

Hi, I have been away from math for a long time and I have to take a test with some math in it. The study guide I was given has a problem I am having trouble with. It seems like a simple substitution and order of operations problem. I think I'm either missing something or there is an error in the book. It says: Consider the following formula,

A=B+3(4-C)
If B equals 5 and C equals 2, what is the value of A?

A. 7
B. 11
C. 12
D. 17

I get 16 every way I have tried to do this. Thanks.

 

[arthur ohlsten]

A=B+3[4-C]
let B=5
C=2

two approaches
1)
A=B+3[4-C]
substitute B=5,C=2
A=5+3[4-2]
A=5+3[2]
A=5+6
A=11 answer

2)
A=B+3[4-C]
clear bracket
A=B+3x4 -3x2
A=5+12-6
A=17-6
A=11 answer

Arthur

 

[grieco]

Ah, I see it now. Thanks so much.

 

[arthur ohlsten]

You are welcome.

Arthur