Question

f(x)=2x+5 and g(x)=x-7,solve for f(g(x)) when x=-3

Answer 1

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Answer 2

f(g(x))=f(x-7)=2(x-7)+5=2x-14+5=2x-9
now put x=-3
f(g(x))=2(-3)-9=-6-9=-15