Question

Me ajudem com esse Teorema!!!

Answer 1

teorema de tales

se  a reta EF for paralela a reta BC pode-se estabelecer a seguinte razão

$\frac{AE}{EB} = \frac{AF}{FC} \\\\\frac{x+1}{2X-1} =\frac{3}{4}\\ \\4(x+1) = 3 ( 2x-1)\\\\4x + 4 = 6x - 3\\\\4+3 = 6x-4x\\\\7 = 2x\\\\x = \frac{7}{2}\\ \\x = 3,5$