To solve the equation \(-4 + 3x = 20\), follow these steps:
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Add 4 to both sides to isolate the term with \(x\):
\[ -4 + 3x + 4 = 20 + 4 \]
This simplifies to:
\[ 3x = 24 \]
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Now, divide both sides by 3 to solve for \(x\):
\[ x = \frac{24}{3} \]
Simplifying that gives:
\[ x = 8 \]
So, the solution to the equation \(-4 + 3x = 20\) is \(x = 8\).