Question

25 – {12 + [ (7 – 5) – (6 – 4) ] – 8}

Answer 1

25-{12+[2-2]-8}

25-{12+0-8}

25-4

=21

Explicação passo-a-passo:

Answer 2

olá !!!

$25-\{12+[(7-5)-(6-4)]-8\}\\25-\{12+[2-(6-4)]-8\}\\25-\{12+[2-2]-8\}\\25-\{12+0-8\}\\25-4$

${\huge{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxede{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed={\boxed2{\boxed1 }}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}$

espero ter ajudado

Att: Jovem Lendário