Step-by-step explanation:
as the sum of the interior angles of a triangle is 180..so
a+b+c=180
(x+2)+x+(6x+10)=180
now
add all variables and all numbers
so
8x+12=180
8x=180-12
8x=168
x=168/8
x=21
now put the values
a=x+2
21+2=23
b=x
21
c=6x+10
136
verify
23+21+136=180
