F(×)=3×+7 — 5×-2,fungsi f–1(×) adalah

f(x)=3x+7/5x-2

misalkan f(x)=y

y=3x+7/5x-2
y(5x-2)=3x+7
5xy-2y=3x+7
5xy-3x=2y+7
x(5y-3)=2y+7
x=2y+7/5y-3

f^-1(x)=2x+7/5x-3