Adding equations of two lines

In solving systems of equations by elimination method you need to add or subtract the equations of lines. Let’s take ax+by=c and dx+ey=f as equations of two distinct lines. To add equations of lines means to add the respective coefficients of x and y and the constants. It is the same as adding like terms. That

Area of shaded regions

Here is problem about area which I’m sure you will enjoy solving. It’s not hard. Just tricky. Problem What is the total area of the shaded part of rectangle ACDB? As suggested by one of the readers, you should be able to explain why you think you have the correct answer. One way to do