Introductory Algebra for College Students (7th Edition)

5z = 30;8 To check whether 8 is the solution of the given expression, Substitute 8 for z 5*8 = 30 (multiply 5*8) 40 $\ne$ 30 The statement is false because the values on both sides of the equation are not same, the number 8 is not the solution of the equation.