Theresa has an umbrella stand at the beach. - All of them are blue, except for six. - All of them are yellow, except for six. -
All of them are red, except for six. How many blue umbrellas does Theresa have?
1 answer:
Answer:
3 Blue Umbrellas
Step-by-step explanation:
Given
From the question, we have:
---- i.e. 6 are not blue
---- i.e. 6 are not yellow
---- i.e. 6 are not red
Required
The number of blue umbrellas
Make B the subject in:
Substitute: in
Collect like terms
Rewrite:
Substitute in
Divide both sides by 2
Recall that:
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