Question

{–[–(15 + 10) + (–20)]} + {5 + [(–20 +5)]} porfa ​

Answer 1

Respuesta:

−(−(15+10)−20)+5−20+5

=−(−25−20)+5−20+5

=−(−45)+5−20+5

=45+5−20+5

=45+5+−15

=45+−10

=35