Question

If 2x=y then find the value of y

Answer 1

(180-x)= 2x(as x and y form a linear pair)

180= 2x+x

3x= 180

x= 180/3

x= 60

y = 2×60

= 120

Answer 2

given that 2x = y......(1)

AB is a straight line

angle x + angle y = 180

x + 2x = 180( because 2x = y)

3x = 180

=> x = 180/3

=> x = 60

put in first

y = 2*60

y= 120