Question

Qual seria o valor de X?

Answer 1

Resposta:

x = 12 cm

Explicação passo-a-passo:

$\frac{CD}{AD}=\frac{BC}{AB}\\\\\frac{10}{8}=\frac{4x-3}{3x}\\\\30x=32x-24\\\\2x=24\\\\x=12$

Answer 2

Resposta:

$\textsf{Leia abaixo}$

Explicação passo-a-passo:

$\mathsf{\dfrac{\overline{\rm AB}}{\overline{\rm AD}} = \dfrac{\overline{\rm BC}}{\overline{\rm CD}}}$

$\mathsf{\dfrac{3x}{8} = \dfrac{4x - 3}{10}}$

$\mathsf{30x = 8(4x - 3)}$

$\mathsf{30x = 32x - 24}$

$\mathsf{32x - 30x = 24}$

$\mathsf{2x = 24}$

$\boxed{\boxed{\mathsf{x = 12\:cm}}}\leftarrow\textsf{letra B}$