The area of a triangle is the base times its height

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.

The diagonals of a quadrilaretral intersect at (-1,4). one of the sides of the quadrilateral is bounded by (2,7) and (-3,5) determine the coordinates of the other side in order for the quadrilaretral to be a square.

How do i put 3(x+7) in distributive property