Question

12 solve for x. answer: 9x + 19 7x + 1

Explanation:

Step1: Set up equation

Since the two angles are corresponding angles (assuming the two horizontal lines are parallel), they are equal. So we set up the equation $9x + 19=7x + 1$.

Step2: Subtract 7x from both sides

$9x-7x + 19=7x-7x + 1$, which simplifies to $2x+19 = 1$.

Step3: Subtract 19 from both sides

$2x+19 - 19=1 - 19$, resulting in $2x=-18$.

Step4: Divide both sides by 2

$\frac{2x}{2}=\frac{-18}{2}$, so $x=-9$.

Answer:

$x = - 9$