For the system of equations below, which of the variables will be eliminated by adding/subtracting the two equations together?
On
-8x - 5y = 14
5x + 5y = 10

pls ask

the answer is b.)

< 1=< 2

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: