Answer:
x=15
Explanation:
Since these angles are vertical angles, they are equivalent, so you can set up the equation like so:
12x+70=16x+10
Then simplify by first subtracting 10 from both sides:
12x+70(-10)=16x+10(-10)
12x+60=16x
Next subtract 12x from both sides:
12x(-12x)+60=16(-12x)
60=4x
After that divide both sides by 4:
60(/4)=4x(/4)
15=x
x=15
15 is your answer.
Hope this helps!