Question

2{4 [7 + 4 (5 · 3 − 9)] − 3 (40 − 8)}

Answer 1

Separa en terminos...
2{4[7+4(5.3-9)]-3(40-8)}
2{4[7+4(15-9)]-3.40+3.8}
2{4[7+4.15-4.9]-120+40}
2{4[7+60-36]-160}
2{4.7+4.60-4.36-160}
2{28+240-144-160}
2.28+2.240-2.144-2.160
56+480-288-320
536-288-320
248-320=-72