Work Step by Step
To find the value of $f(2m-3)$, substitute $2m-3$ to $x$ in $f(x)$ to obtain: $f(x)=-3x+4 \\f(2m-3)=-3(2m-3)+4 \\f(2m-3) = -3(2m) +(-3)(-3)+4 \\f(2m-3)=-6m+9+4 \\f(2m-3)=-6m+13$
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