If \( f(x) = 5x - 4 \) and \( f(4a) = 80 \), then what is the value of \( a \)?
6. If \( f(x) = 5x - 4 \) and \( f(4a) = 80 \), then what is the value of \( a \)?
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info@snapandsolve.comTo find the value of \( a \), we start by substituting \( 4a \) into the function:
\( f(4a) = 5(4a) - 4 = 80 \)
\( 20a - 4 = 80 \)
Add 4 to both sides:
\( 20a = 84 \)
Divide both sides by 20:
\( a = \frac{84}{20} = 4.2 \)
Answer: 4.2
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