Answer:
12
Step-by-step explanation:
Angles in a triangle add up to 180 degrees
so
we have the angles as (58 degrees) , (8x-18)degrees and (4x-4)degrees
lets form an equations
so
58+(8x-18)+(4x-4)=180
arrange these
we have
58-18-4+8x+4x=180
36+12x=180
(take36 to the right)
12x=180-36
12x=144
divide by 12 both sides
we get 12 as x
