Question

30-{ 20- 4×[ 30-(2+3)×2]÷2=

Answer 1

Resposta:

$30-20-4\times \:\left[30-\left(2+3\right)\times \:2\right]\div \:2\\\\30-\left(2+3\right)\times \:2\\\\30-5\times \:2\\\\30-10\\\\20\\\\\\30-20-4\times \:20\div \:2\\\\4\times \:20\div \:2\\\\80\div \:2\\\\40\\\\\\30-20-40\\\\10-40\\\\-30$