Answer:
x= 14
Explanation:
angles on a straight line add to 180°
if u take away the horizontal line there is a straight line
as the angles add to 180° on a line
(6x-10)+(7x+8)= will equal 180°
take away the brackets
6x-10+7x+8 = 180
clean up the the left hand side
13x-2 =180
add 2 to both sides
13x = 182
then divide by 13 to get x by itself
x= 14