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You are solving for the variable, k. Isolate the variable, k. Note the equal sign, what you do to one side, you do to the other.
First, distribute -12 to all terms within the parenthesis:
-12(k + 4) =
-12 * k = -12k
-12 * 4 = -48
-12k - 48 = 60
Isolate the variable, k. Note the equal sign, what you do to one side, you do to the other. Do the opposite of PEMDAS.
PEMDAS is the order of operation, and equal:
Parenthesis
Exponents (& Roots)
Multiplication
Division
Addition
Subtraction
First, add 48 to both sides of the equation:
-12k - 48 (+48) = 60 (+48)
-12k = 60 + 48
-12k = 108
Next, divide -12 from both sides of the equation:
(-12k)/-12 = (108)/-12
k = 108/-12
k = -9
k = -9 is your answer.
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