Question

20. The angles of a triangle are x, y and 40°. The
difference between the two angles x and y is 30°.
Find x and y.​

Answer 1

total angles in a triangle = 180

so :

• x + y + 40 = 180

x + y = 140

diff between x and y is 30 degrees.

therefore,

• x - y = 30

now add both the equations :

x + y = 140

x - y = 30

2x = 170 (both y's cancel each other)

x = 85

use x = 85 to find y

85 - y = 30

y = 85 - 30

y = 55

so in the end we get :

x = 85 and y = 55

hope I helped :))