Respuesta :

[tex]5 (g-5) - (5-g) = 12\\5g - 25 -5 +g =12\\6g -30 = 12\\6g = 42\\g =  7[/tex]


Check:

[tex]5(7-5) - (5-7) = 5 (2) - (-2) = 10 + 2 = 12[/tex]