Verification
To verify a solution, it must be able to render the equation true.
This means that after plugging in the solution into all its placeholders (the variable) and evaluating, both sides of the equation should equal each other.
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Verifying the Problem
We're told that the solution of the equation is t = 3, so we plug in 3 to all of the "t" terms.
-7(3) = 3(3) - 30
-21 = 9 - 30
-21 = -21
Both sides are equal to each other, thus t = 3 is the solution to this equation!
