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What is the value of a if ab plus ac equals 21 and b plus c equals 7?
Updated: 9/18/2023
Wiki User
∙ 13y agoBest Answer
To find this:
You know (B+C) = 7. Therefore you know (A+A )= 21 - (B+C). Therefore 21-7 = 14.
So now you know (A+A) = 14. So you divide (A+A)/2.
This equals 7. Therefore A = 7.
Wiki User
∙ 13y agoThis answer is:
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