Given that the function f (x) satisfies the condition, 2f (- x) + FX = 2x-3 (x belongs to R), find the analytic expression of F (x)

Given that the function f (x) satisfies the condition, 2f (- x) + FX = 2x-3 (x belongs to R), find the analytic expression of F (x)

2f(-x)+f(x)=2x-3①
Substituting - x, we get
2f(x)+f(-x)=-2x-3②
② X 2 - 1
3f(x)=-6x-3
f(x)=-2x-1
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