Answer:
x=83
Step-by-step explanation:
97+x=180
x=83
Answer:

Step-by-step explanation:
we know that
The <u><em>Triangle Inequality Theorem</em></u> states that the sum of any 2 sides of a triangle must be greater than the measure of the third side
so
Applying the Triangle Inequality Theorem
1) 
solve for n

Rewrite

2) 

therefore

Line 3
since he added which is against the order of opreation rule he was supposed to multiply first then add
again what he was supposed to do is
Line 2:21+5+6(2)
Line 3:21+5+12
Answer= X>3
5x>15
Divide both sides by 5x

5x will cancel with 15. You get 3
So, x>3
23. because there is a 90 degree angle and then the 67 degree angle, and triangle law says that all angles add up to 180.