Find the solution of 7x = 35, and verify your solution using substitution.

A. x = 245; 7 (35) = 245, 245 = 245

B. x = 6; 7 (6) = 35, 35 = 35

C. x = 5; 7 (5) = 35, 35 = 35

D. x = - 5; 7 (-5) = 35, - 35 = - 35

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