An equation is given
y = 3x + c Create an equivalent equation by solving for x in terms of y and c.
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Lena sells customprinted tshirts at her shop. She can sell 120 tshirts in a month if she charges $14 for each tshirt. She plans to change the price per tshirt by a fixed amount n times. The revenue, in dollars, after n changes in price can be modeled by the expression (120 + 5n)(14  3n).
Based on the information, complete the sentence about Lena’s tshirt sales. For each_______________ in the price per tshirt by $_____________, Lena will sell _____________tshirts in a month. A linear function is given:
a(x) = 26  12.4x The function b is also linear. The equation a(x) = b(x) has exactly one solution at x = 5. Create a possible equation for function b. 
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