What is the justification of each step

Justification: Addition Property of Equality (The quantity x was added to each side of the equation.) Justification: Subtraction Property of Equality (Two was subtracted from each side of the equation.) Justification: Division Property of Equality (Each side of the equation was divided by four.)

Step-by-step explanation:

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,

you didn't post any answer choices, so its not 100% clear what your teacher is looking for

however, log(15/7) is equivalent to log(15) - log(7)

i'm using the rule log(x/y) = log(x) - log(y)