f(x) = -14 - 4(5 - 3x)
distribute the -4 to the whole parentheses
-4 × 5 = -20
-4 × -3x = 12x
f(x) = -14 -20 + 12x
subtract 14 from -20
f(x) = -34 + 12x
There you go! I really hope this helped, if there's anything just let me know! :)
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