A person owns two shops. This year the telephone bill for the first shop was $660 less than three times the telephone bill for the secomd shop. The total telephone expense for both shops wqs $2648. What was the cost of each shop's telephone service for the year?

step-by-step explanation:

for exempl this   system of equations   y = x - 3

                                                                y = 2x - 5

look   the line : y = x -3     ( red)

                            the line : y = 2x -5 ( bleus)

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step-by-step explanation:

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you need to rotate this triangle about the origin 270 degrees clockwise to create the full square.