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September 15, 2014

September 15, 2014

Posted by **K** on Friday, February 21, 2014 at 3:58pm.

- Intermediate algebra -
**Reiny**, Friday, February 21, 2014 at 4:07pmlet number of AC adapters be x

let number of flashlights be y

7x + 2y = 86

3x + 4y = 84

double the first equation

14x + 4y = 172

3x + 4y = 84

subtract them

11x = 88

x = 8

sub back into 1st:

7(8) + 2y = 86

2y = 30

y = 15

so 8 adapters and 15 flashlights.

Check my answer to see if it fits the given data

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