Question

Calcule o valor de x, sabendo que as retas a, b e c são paralelas. *
​

Answer 1

8+2x-6=12+x-6

2x-x=12-6-8+6

X=4

Answer 2

Explicação passo-a-passo:

Usando o Teorema de Tales:

$\dfrac{8}{x+1} =\dfrac{12}{2x-6}\\\\8.(2x-6)=12.(x+1)\\\\16x-48=12x+12\\\\16x-12x=12+48\\\\4x=60\\\\x=\dfrac{60}{4}\\\\\boxed{\boxed{x=15}}$