Ecuaciones lineales usando el metodo de eliminacion con procedimiento

x=-40t + 502

x=25t - 18

ayudenme x favor ...

I can't understand your language but i assume u want to find x so ...

x=-40t + 502 (1)

x=25t - 18 (2)

Replace (1) in (2):

-40t + 502 = 25t - 18

-40t - 25t = - 502-18

-65t = - 520

t = - 520/-65

t = 8

Then replace t in (2):

x = 25x8 - 18

x = 182