Answer:
x = 14.2222
Explanation:
Two adjacent angles add up to 180o when 2 lines cross.
58 + 9x - 6 = 180 Combine like terms on the left.
58 - 6 + 9x = 180
52 + 9x = 180 Subtract 52 from both sides.
9x = 180 - 52 Combine like terms
9x = 128 Divide both sides by 9
x = 128/9
x = 14.222 Answer for x
Check
58 + 9* 14.22222 = 180
58 + 128 - 6 = 180
186 - 6 = 180
180 = 180 which means that the equation checks.