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ajutor dau coroana ajutor plz​

Ajutor Dau Coroana Ajutor Plz class=

Răspuns :

Explicație pas cu pas:

2)

{4x[(3+x):9+7]-30}x2-12=1768

{4x[(3+x):9+7]-30}X2=1768+12

{4x[(3+x):9+7]-30}X2=1780

{4x[(3+x):9+7]-30}=1780:2

{4x[(3+x):9+7]-30}=890

4x[(3+x):9+7]=890+30

4x[(3+x):9+7]=920

[(3+x):9+7]=920:4

[(3+x):9+7]=230

(3+x):9=230-7

(3+x):9=223

3+x=223x9

3+x=2007

x=2007-3

x=2004

2)

n:12=c rest x2

12x1+2=14

12x2+4=28

12x3+6=42

12x4+8=56

12x5+10=70