3(x-12)=15 what number is x fist to answer gets brainlest

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?

Angle xyz is formed by segments xy and yz on the coordinate grid below: a coordinate plane is shown. angle xyz has endpoints at 3 comma negative 1 and 6 negative 2 and 3 comma negative 3 and measures 36.87 degrees. angle xyz is rotated 270 degrees counterclockwise about the origin to form angle x′y′z′. which statement shows the measure of angle x′y′z′?

What is always true about a positive integer raised to a negative odd power?