[tex] \frac{3x}{12}+ \frac{4x}{12}+375* \frac{12*12}{12} = \frac{12x}{12} [/tex]
[tex](12/12=1)
[/tex]
[tex] \frac{3x}{12}+ \frac{4x}{12}+375 = \frac{12x}{12} [/tex]
[tex]\frac{7x}{12}+375 = \frac{12x}{12} [/tex](MMC 12,1)
[tex]\frac{7x}{12}+ \frac{4500}{12} = \frac{12x}{12} [/tex](ANULANDO BASE 12)
[tex]{7x}+ {4500} = {12x}[/tex]
[tex] {4500} = {12x -7X}---->5X=4500[/tex]
[tex]X=4500/5[/tex]
[tex]X=900[/tex]
