Question

calculeaza n
{{(n x 2+40 x 20):23+12] x 6-6}:30= 15

Answer 1

Răspuns:

{{(n x 2+40 x 20):23+12] x 6-6}:30= 15

{{(n x 2+40 x 20):23+12] x 6-6}=15x30

[(nx2+800):23+12]x6-6=450

[(nx2+800):23+12]X6=450+6

[(nx2+800):23+12]X6=456

[(nx2+800):23+12]=456:6

(nx2+800):23+12=76

(nx2+800):23=76-12

(nx2+800):23=64

(nx2+800)=64x23

nx2+800=1472

nx2=1472-800

nx2=672

n=672:2

n=336