Question

Tarea Eliminar los signos de agrupación de. - [ 11+ 4 2 ÷ 7 - (3x2-7)]-(-12-7)​

Answer 1

$- [ 11+ 4 2 ÷ 7 - (3 \times 2-7)]-(-12-7) = \\ - [11 + 42 \div 7 - (6 - 7)] - ( - 12 - 7) = \\ - [ 11 + 42 \div 7 - ( - 1) ] - ( - 12 - 7) = \\ - (11 + 42 \div 7 + 1) - ( - 12 - 7) = \\ - (11 + 6 + 1) - ( - 12 - 7) = \\ - (17 + 1) - ( - 12 - 7) = \\ - 18 - ( - 19) = \\ - 18 + 19 = \\ 1$