When a number is increased by 12, the results is equal to twice the number equation

The figure above shows the lengths of thesides of a rectangle in cm. find the valuesof x and y and then the area of the rectangle.sides: top= 3x - yleft= 3y + 4bottom= 2x + yright= 2x - 3 use both methods, elimination and substitution, if possible.

Which is the completely factored from of xy^3-x^3y

Find the number of real number solutions for the equation. x2 + 5x + 7 = 0 0 cannot be determined 1 2