To solve the inequality \(-2.6x - 20.8 \leq -52\), we can follow these steps:
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Add 20.8 to both sides of the inequality:
\[ -2.6x - 20.8 + 20.8 \leq -52 + 20.8 \]
This simplifies to:
\[ -2.6x \leq -31.2 \]
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Divide both sides by -2.6. Remember that when we divide an inequality by a negative number, we must reverse the inequality sign:
\[ x \geq \frac{-31.2}{-2.6} \]
Calculating the division gives:
\[ \frac{-31.2}{-2.6} = 12 \]
So, the solution to the inequality is:
\[ x \geq 12 \]
In interval notation, this can be expressed as:
\[ [12, \infty) \]