• anonymous
PLEASE HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! (08.03)Solve the system of equations and choose the correct answer from the list of options. x − y = 7 y = 3x + 12 2 over 19 comma 2 over 33 negative 2 over 19 comma negative 33 over 2 negative 19 over 2 comma negative 33 over 2 19 over 2 comma 33 over 2
  • Stacey Warren - Expert
Hey! We 've verified this expert answer for you, click below to unlock the details :)
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
  • schrodinger
I got my questions answered at in under 10 minutes. Go to now for free help!
  • Tommynaut
Do you understand what the question is asking for? When you solve 2 equations at the same time, you're solving for 2 different variables (letters) at the same time; this means you're trying to find the value of x and the value of y that makes each equation true. For example, the equation 2x = 4 can be solved with the solution that x = 2. This is only one equation, however. When we solve for 2 equations simultaneously (at the same time) we need to consider just one equation first. There are a few ways of solving simultaneous equations - the easiest way in your situation is to use SUBSTITUTION. Let's work through an example. x + y = 5 ... (equation 1) x - y = 1 ... (equation 2) First of all, we choose an equation (it doesn't matter which!). Let's choose equation (2). Let's choose a variable (again, it doesn't matter which one we choose!) that we want all by itself... I'm going to choose x. If we rearrange the equation, we get x = 1 + y (we just added y to both sides of the equation) We then SUBSTITUTE this "new" equation into (1), so we get (1+y) + y = 5, which we can then solve 1 + 2y = 5 2y = 4 y = 2 Now that we have y = 2, we can SUBSTITUTE that back into either equation to find x. Let's choose (2) again (it doesn't matter which one we choose here either!) x - y = 1, so x - 2 = 1 x = 3 So we end up with x = 3, y = 2. Try a similar approach in your question.

Looking for something else?

Not the answer you are looking for? Search for more explanations.