Răspuns:
(a×3-11)×4=a×11-15
(3a-11)*4=11a-15
12a-44=11a-15
12a-11a= -15+44
a=29
[tex](x \times 3 - 11) \times 4 = x \times 11 - 15[/tex]
[tex](3x - 11) \times 4 = 11x - 15[/tex]
[tex]12x - 44 = 11x - 15[/tex]
[tex]12x - 11x -44 = - 15 = > 12x - 11x = - 15 + 44[/tex]
[tex]x = - 15 + 44[/tex]
[tex]x = 29[/tex]
[tex](29 \times 3 - 11) \times 4 = 29 \times 11 - 15[/tex]
[tex]76 \times 4 = 319 - 15[/tex]
[tex]304 = 304[/tex]
