## Elementary Algebra

Because x is in the denominator, and the denominator cannot equal 0, x $\ne$ 0. We must multiply both sides of the equation by x. x + 3 = (1 + $\frac{3}{x}$) $\times$ x Use the distributive property. x + 3 = x + 3 Subtract x from both sides. 3 = 3 As we can see, this equation is true for every value of x, except the case when x = 0, because we found out at the beginning that x $\ne$ 0.