Is x-3 a solution of the equation 3x-5=4x-9

When a rectangle is dilated, how do the perimeter and area of the rectangle change?

What can you determine about the solutions of this system

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 (%)