Question

Eliminar signos de agrupación

1] {20-6(10-2)+12-6-3(-3-6)+19}

2] [23-18+7(-1-7)-6(5+7)+10-21]

Answer 1

1 { 20-6(10-2)+12-6-3(-3-6)+19}
{ 20-6(-2) +12-6-3(-9) +19}
{20+12+12-6+27+19}
=88
2 [ 23-18+7(-1-7)-6(5+7)+10-21]
[23-18+7(+7)-6(12)+10-21]
[23-18+49-72+10-21]
= -29