Which of the following is the best first step in solving the equation below?
4logsx = 28
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a. log5x = 7
b. 4x = 528
c. log5 = 7
d. log4 + log5x = log7

To solve the system of equations below, grace isolated the variable y in the first equation and then substituted into the second equation. what was the resulting equation? 3y=12x x^2/4+y^2/9=1