Answer:
C
Step-by-step explanation:
Alright so for this one they want us to find the x values of angle 3 and angle 5 and those 2 angles happen to be supplementary meaning that the two angles will add up to equal 180. So to setup the equation we do
180 = 5x+10+3x+10
step 1 combine like terms ( 5x +3x and 10 + 10)
180 = 8x +20
step 2 subtract each side by 20
160 = 8x
step 3 divide each side by 8
x=20
