Question

y-10 2y y+30 find the measure of the angle in the following figure​

Answer 1

let a =2y

b=y-10

c=y+30

now,

a+b+c=180 (Linear pair )

2y+y-10+y+30=180

4y+20=180

4y=160

y=40

Answer 2

Answer:

$2y + y - 10 + y + 30 = 180 {}^{0} (linear \: pair \: ) \\ 4y + 20 = 180 \\ 4y = 160 \: \\ y \: = 160 \div 4 \\ y = 40$

angle 1 = 30

angle 2 = 80

angle 3 = 70