Question

A+B+C=180grade A,B,C nr consecutive

Answer 1

A, B, C- nr. consecutive => B=A+1
C=B+1=A+1+1=A+2
A+B+C=180 și înlocuiești
A+A+1+A+2=180
3A+3=180
3(A+1)=180
A+1=180/3
A+1=60
A=60-1=59
B=A+1=59+1=60
C=A+2=59+2=61