Question

The adjoining diagram shows two intersecting straight lines. find the values of x, y and z.

Answer 1

3x-10 and 2x+15 are vertically opposite angles so they're equal
3x-10=2x+15
x=25

Z=Y
and z+ 3x-10=180(angles in a straight line)
z + 65=180
z= 115

Answer 2

3x - 10° = 2 x + 15° (vertically opposite angle)

X =25

Z+3x+10=180°( angle of a point on straight line)

Z+65=180°

Z=115