The first three statements are correct while the last statement is incorrect.
Log x+ log 7= log 42
log x=log 42 - log 7
log x=log 42/7 [ log a - log b= log (a/b) ]
log x= log 6
therefore:
x=6
Answer: x=6
Answer:

Step-by-step explanation:
Substitute the value of the variable into the equation and simplify.
Answer:
(1,-2)
(1,-6)
(3,-3)
Step-by-step explanation: