If the degree measure of an angle is 40 less than 3 times the degree measure of its supplementary angle, what is the degree measure of the angle?
a. 50
b. 55
c. 125
d. 130

mathpapa

step-by-step explanation:

take the logarithm of both sides (the base of the log doesn't matter):

apply the exponent property - this says that :

distribute the log terms on both sides:

group like terms together:

divide through both sides by the coefficient on :

you can do some additional rewriting here using the properties of the logarithm to simplify things if you like: