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Ricasecuianu1957
a fost răspuns

determinați x........12•[2(X+3)+5]:6+12:3-7=27​

Răspuns :

Rodica01

12•[2(x+3)+5]:6+12:3-7=27

12•[2(x+3)+5]:6+4-7=27

12•[2(x+3)+5]:6+4=27+7

12•[2(x+3)+5]:6+4=34

12•[2(x+3)+5]:6=34-4

12•[2(x+3)+5]:6=30

12•[2(x+3)+5]=30•6

12•[2(x+3)+5]=180

[2(x+3)+5]=180:12

2(x+3)+5=15

2(x+3)=15-5

2(x+3)=10

x+3=10:2

x+3=5

x=5-3

x=2

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