Respuesta :

(10x+5) + (6x-1)=180
10x+5+6x-1=180
16x+4=180
16x+4=180
16x=180-4
16x=178
x=11
gaudvile2006
10 timea 5 is 50 6 take away 1 is 5 50 take away 5 is 45 71 take away 45 is 26 take away 3 is 23. So D is your answer