if AB =5x-3and CD=2x+9 find AB
You have already said that AB = 5x -3.
You appear to have mistyped the question and omitted an important figure or description of how AB and CD are related.
AB=5x-3
To find the value of AB, we need to know the value of 'x' first. The values of 'x' and AB are related through the given equation AB = 5x - 3.
Since we don't have any information about 'x' or any other related equations, we cannot determine the exact value of AB without additional information.