It just means to get y by itself. So first, subtract 7x from both sides, making the equation 3y = 6 - 7x. Then divide by 3 on both sides. The resulting equation is y = 2 - 2.3333...x, or 7x/3. Now, if you were given an x-value, then the answer is an actual number instead of a variable. Do you have an x-value?