A number to the 12th power divided by the same number to the 9th power equals 343. What is the number?

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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,

answer4 to the second power is 16

and 4 to the third power is 64,