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e) 7 + 3 - [2 +5. 4. (3 + 2x)] = 313;​

Răspuns :

Răspuns:

7+ 3 - [2 +5. 4. (3 + 2x)] = 313;

7+3-60+40x=313

40x=363

x=363/40=9,075

Răspuns:

2+20(3+2x)=313

2+60+40x=313

62+40x=313

40x=313-62

40x= 251

x=251:40

x= 6,27