y = 8 -2x
x + 2 (8 - 2x) = 1
x + 16 - 4x = 1
x - 4x = -15
-3x = -15
x = 5
If x = 5, then we can substitute in...
5 + 2y = 1
2y = -4
y = -2
Now let us check that by substituting those values in to the equation
2x + y = 8
2 (5) + (-2) = 8
That is correct so we have the right values for x and y/
Answer:
13 = u
Step-by-step explanation:
Please include the instructions. I'm assuming you are to "solve for u."
Dividing both sides by 2, we get:
3u + 7 = -2(3 - 2u), or 3u + 7 = -6 + 4u. Combine like terms.
Then 13 = u
$7.85 x .8 yards=$6.28.
$10-$6.28=$3.72 change back
![\frac{ {x}^{2} - 7x + 12}{ {x}^{2} - x - 12 } \\ = \frac{ {x}^{2} - 4x - 3x + 12 }{ {x}^{2} - 4x + 3x - 12 } \\ = \frac{x(x - 4) - 3(x - 4)}{x(x - 4) + 3(x - 4)} \\ = \frac{(x - 3)(x - 4)}{(x + 3)(x - 4)} \\ = \frac{x - 3}{x + 3}](https://tex.z-dn.net/?f=%20%5Cfrac%7B%20%7Bx%7D%5E%7B2%7D%20%20-%207x%20%2B%2012%7D%7B%20%7Bx%7D%5E%7B2%7D%20-%20x%20-%2012%20%7D%20%20%5C%5C%20%20%3D%20%20%5Cfrac%7B%20%7Bx%7D%5E%7B2%7D%20-%204x%20-%203x%20%2B%2012%20%7D%7B%20%7Bx%7D%5E%7B2%7D%20-%204x%20%2B%203x%20-%2012%20%7D%20%20%5C%5C%20%20%3D%20%20%5Cfrac%7Bx%28x%20-%204%29%20-%203%28x%20-%204%29%7D%7Bx%28x%20-%204%29%20%2B%203%28x%20-%204%29%7D%20%20%5C%5C%20%20%3D%20%20%5Cfrac%7B%28x%20-%203%29%28x%20-%204%29%7D%7B%28x%20%2B%203%29%28x%20-%204%29%7D%20%20%5C%5C%20%20%3D%20%20%5Cfrac%7Bx%20-%203%7D%7Bx%20%2B%203%7D%20)
x² - x - 12 ≠ 0
x² - 4x + 3x - 12 ≠ 0
x (x - 4) + 3 (x - 4) ≠ 0
(x + 3)(x - 4) ≠ 0
x ≠ -3 or x ≠ 4
(B)