Answer:
x = 40
Explanation:
Hello there!
Remember the circumference of a circle in degrees is equal to 360
so all of the arcs added together will equal 360
360 = x + 20 + 3x + 15 + 4x + 5
step 1 combine like terms
1x+3x+4x=8x
20+15+5=40
now we have 360 = 8x + 40
step 2 subtract 40 from each side
360 - 40 = 320
40 - 40 cancels out
now we have 320 = 8x
step 3 divide each side by 8
320/8=40
8x/8=x
we're left with x = 40