f(x) = 2x is the Answer!
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Answer:
3.17
Step-by-step explanation:
x = - 4
Given
r(x) = - 5x - 1 and r(x) = 19, then equating the right sides gives
- 5x - 1 = 19 ( add 1 to both sides )
- 5x = 20 ( divide both sides by - 5 )