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Acompany that manufactures and sells guitars made changes in their product range. from the start they had 20 models. then they reduced the number of models to 15. as a result, the company enjoyed a 10% increase in turnover. - how much did the stock level change? in (%)

Write 5(6x+4)-2(5x-2) in the form a(bx+c) where a, b and c integers and a> 1