I drew the parallelogram in the picture you can see below. With the data of the exercise we realize that the parallelogram is a rectangle. So, with 2 sides of 11 feet long and the other side of 8 feet long, the last side have to measure 8 feet long.
To add integers with different signs, subtract the lesser absolute value from the greater absolute value. Use the sign of the integer with the greater absolute value for the sum. The following steps will be useful to find the sum of two numbers with different signs.
Answer: If the equation ends with a false statement (ex: 0=3) then you know that there's no solution. If the equation ends with a true statement (ex: 2=2) then you know that there's infinitely many solutions or all real numbers.
