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Marius555
a fost răspuns

7x{2+6x[20-3x(11x3-27)]}+x=2109

Răspuns :

Renatemambouko
7×{2+6×[20-3×(11×3-27)]}+x=2109
7×{2+6×[20-3×(33-27)]}+x=2109
7×[2+6×(20-3×6)]+x=2109
7×[2+6×(20-18)]+x=2109
7×(2+6×2)+x=2109
7×(2+12)+x=2109
7×14+x=2109
98+x=2109
x=2109-98=2011


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