Answer:
x = 6
Explanation:
the 3 angles in a triangle sum to 180°
sum the 3 angles and equate to 180
7x + 8 + 102 + 28 = 180
7x + 138 = 180 ( subtract 138 from both sides )
7x = 42 ( divide both sides by 7 )
9.4m questions
12.2m answers