Hey there!
Explanation:
First, you had to do is add by 13 from both sides of an equation.
Then, simplify or add by the numbers.
Next, you can also divide by 3 from both sides of an equation.
And finally, simplify and divide by the numbers,
*The answer must have a positive sign.*
Hope this helps!
Answer:
<h2>x=68</h2>
Basic fact:
<em>angles in a triangle add up to make 180 degrees</em>
Step-by-step explanation:
we know that
72+40+x=180
112+x=180
-112
x=68