Answer:
24.75
Step-by-step explanation:
2x-11 + 6x-7 =180
8x-18=180
8x=198 /8
x=24.75
(2x-11)°+(6x-7)°=180°(being sum of the angle of the triangle is 180°
=2x-11+6x-7=180°
=8x+4=180°
=8x=180-4
=8x=176
=x=176/8
=x=22
