suatu fungsi f(x)=4x+2. tentukan nilai dari: a) f(-1) b) f(27) c) f(-1)-(27) d) x jika f(x)= -26

a) f(-1)= 4(-1)+2 = -4 +2 = -2
b) f(27)= 4(27)+2= 110
c) f(-1)-27= 4(-1)+2-27= -29
d) f(x)= 4x+2
-26= 4x+2
4x= -26-2
4x=-28
x=-7