Two supplementary angles have measures m∠ABC=105° and m∠CBD=(3x−24)° . What is the equation to solve for x ?

The sum of two supplementary angles is 180 degrees.

So, we can write the equation:

m∠ABC + m∠CBD = 180°

105° + (3x - 24)° = 180°

Simplify the equation by combining like terms:

3x + 81° = 180°

Subtract 81° from both sides:

3x = 99°

Divide both sides by 3 to solve for x:

x = 33°

Therefore, the equation to solve for x is x = 33°.