Question

30-{20-4.[30-(8+4).2]:2}

Answer 1

30-{20-4[30-(12).2]:2}
30-{20-4[30-24]:2}
30-{20-4[6]:2}
30-{20-24:2}
30-{20-12}
30-{8}
30-8
22

Answer 2

Oi

30 - {20 - 4 .[30 - ( 8 + 4) . 2] ÷ 2}

30 - {20 - 4 . [30 - 12.2] ÷ 2}

30 - {20 - 4 .[30 -24] ÷ 2}

30 - {20 - 4 . 6 ÷ 2}

30 - {20 - 24 ÷ 2}

30 - {20 - 12}

30 - 8

22

Espero ter ajudado