How can I use equation 7 to answer column 6

Equation 4 states that the absorbance measured in Table 2 is related to the concentration of [FeSCN]²⁺_eq. The value of the [[FeSCN]²⁺]_eq can be determined using a reference. Equation 5 shows the Beer-Lambert Law for a reference solution where the concentration of [FeSCN]²⁺_eq is known. Equation 6 shows the Beer-Lambert Law for any sample solution where the concentration of [[FeSCN]²⁺]_eq is unknown. Equation 7 can be mathematically derived from Equations 5 and 6 which allows for the determination of [[FeSCN]²⁺]_eq of a sample based on the reference solution.

Equation 5: A_ref = b[[FeSCN]²⁺]_ref

Equation 6: A_x = b[[FeSCN]²⁺]_x

Equation 7: [[FeSCN]²⁺]_x=[[FeSCN]²⁺]ref^Ax /A^ref

Beaker	[Fe3+]i (M) (Dilution)	[SCN-]i (M) (Dilution)	[Fe+3]eq (M) (Equation 2)	[SCN-]eq (M) (Equation 3)	[[FeSCN]2+]eq (M) (Equation 7)	Kc
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Lab Temperature					Average Kc