Question

cuanto es {21+32-[14+(20-5)]+[15-(8+4-5)]}+(8-2)-30?
ayuden ;-;​

Answer 1

21+32−(14+20−5)+15−(8+4−5)+8−2−30

=53−(14+20−5)+15−(8+4−5)+8−2−30

=53−(14+15)+15−(8+4−5)+8−2−30

=53−29+15−(8+4−5)+8−2−30

=24+15−(8+4−5)+8−2−30

=24+15−(12−5)+8−2−30

=24+15−7+8−2−30

=24+8+8−2−30

=32+8−2−30

=32+6−30

=38−30

=8

$21+32−(14+20−5)+15−(8+4−5)+8−2−30</em></strong><strong><em>=53−(14+20−5)+15−(8+4−5)+8−2−30 \\ =53−(14+15)+15−(8+4−5)+8−2−30 \\ =53−29+15−(8+4−5)+8−2−30 \\ =24+15−(8+4−5)+8−2−30 \\ =24+15−(12−5)+8−2−30 \\ =24+15−7+8−2−30 \\ =24+8+8−2−30 \\ =32+8−2−30 \\ =32+6−30 \\ =38−30 \\ \color{darkgreen}\boxed { =8}$