Two supplementary angles measure (3x + 5) and (9x - 5), the value of x is _____?
Two supplementary angles measure (3x + 5) and (9x - 5), the value of x is _____?
Explanation
Supplementary angles add up to 180°, so set up an equation:
(3x + 5) + (9x - 5) = 180°
Combine like terms:
12x = 180°
Divide both sides by 12:
x = 15°