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[4x(2X+3)+2²] :12-2=3

Răspuns :

[4×(2x+3)+2 la puterea 2]:12-2=3
[4×(2x+3)+4]:12=5
4×(2x+3)+4=60
4×(2x+3)=56
2x+3=14
2x=14-3
2x=11
x=11:2
x=5 rest 1