Do I solve equations with rational coefficients

What is the solution of log2  (3x  -  7)  =  3? 4 5

A. 90 degrees b. 45 degrees c. 30 degrees d. 120 degrees

The area of a rectangle is 10 cm^2. one side of the rectangle is x cm. express the perimeter of the rectangle in terms of x and show that this rectangle cannot have a perimeter of 12 cm. the perimeter of the rectangle in terms of x is __ cm