Complete the statements about the system of linear equations represented by the tables. The equation representing the left table is . The equation representing the right table is . The solution to the system of equations is .

In a certain pentagon, the interior angles are a, b,c, d,e where a, b,c, d,e are integers strictly less than 180. ("strictly less than 180" means they are "less than and not equal to" 180.) if the median of the interior angles is 61 and there is only one mode, then what are the degree measures of all five angles?

Another type of subtraction equation is 16-b=7. explain how you would sole this equation then solve it.

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