Assuming you want us to answer question 12. 11x - 7y = -14 x - 2y = -4
From the second equation, you can find x by adding 2y to both sides. x = 2y - 4
Now that you've found what x is, go back to the first equation 11x - 7y = - 14 But now, wherever you see x in this, substitute in what you found for x. Our value for x is 2y - 4. 11(2y - 4) - 7y = -14 Expand and simplify 22y - 44 - 7y = -14 15y - 44 = -14 15y = 30 y = 30/15 = 2
Now we know what y is, lets find x as a number. Use what we found as x to find it as a number (x = 2y - 4), but substituting in 2 wherever we see 'y'. So x = 2(2) - 4 = 4 - 4 = 0
Okay so what you need to do is find the value of x or y. Substitute x or y for 0. After you do that, you'll be left with x on one side and y on the other. That's perfect. If x is alone, you want to substitute that into the equation, In parentheses. Then when you solve for the other term, you'll actually get a number answer. Then put that into the equation and substitute it where it should go, then solve and you'll get the second number
