Answer:
118 degrees
Explanation:
To find this, obviously, you must first solve for x. To do this you must find, in what way do all 3 angles relate. One thing we do know, all angles in a triangle must add up to 180 degrees. Therefore lets set up an equation where we are adding all the equations and setting it equal to 180:
x + (x - 8) + (3x + 13) = 180
Now we solve for x.
Combine like terms:
x + x + 3x = 5x
-8 + 13 = 5
5x + 5 = 180
Subtract 5 from both sides:
5x = 175
Divide both sides by 5:
x = 35
Now we must plug in 35 for x in the equation for angle A:
3(35) + 13 = 118
Another way we could've done this is plug in x for angle c and angle b and just subtract those values from 180 to get 118.