We set up this expression that we have to simplify. Although, to make it an equation, we set the expression given equal to the variable y, making this a function too.
y=x-(2x+5)
distribute the negative symbol
y=x-2x-5
combine like terms
y=-x-5
and that is our final answer
The number of friends triples each day (16 x 3 = 48, 48 x 3 = 144, and so forth)
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I don't understand your question
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