Question

120+4*[40+(a+320):4]-16=600
urgent

Answer 1

4*[40+(a+320):4]=600+16-120
4*[40+(a+320):4]=496
40+(a+320):4=496:4
40+(a+320):4=124
(a+320):4=84
a+320=336
a=16

Answer 2

120+4*[40+(a+320):4]-16=600

$120+4(40+ \frac{a+320}{4} )-16=600$

120+160+a+320-16=600

584+a=600

a=600-584 = 16

a=16