\( f(x)=\frac{1}{4} x-8 \) If \( f(X)=-\frac{7}{2} \), find \( X \)
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To solve for \(X\) in the equation \( f(x) = -\frac{7}{2} \), we can start by setting \(f(X)\) equal to the given value. \[ \frac{1}{4}X - 8 = -\frac{7}{2} \] Next, we want to isolate \(X\). First, add 8 to both sides: \[ \frac{1}{4}X = -\frac{7}{2} + 8 \] Converting 8 into a fraction gives us \(8 = \frac{16}{2}\), so we have: \[ \frac{1}{4}X = -\frac{7}{2} + \frac{16}{2} = \frac{9}{2} \] Now, to find \(X\), multiply both sides by 4: \[ X = 4 \cdot \frac{9}{2} = \frac{36}{2} = 18 \] Thus, the value of \(X\) is \( \boxed{18} \).