(x-1)+(x-2)=3 x-1+(x-2)=3 x-1+x-2=3 Then collect the two like terms x-1+x-2=3= 2x-1-2=3 Calculate the difference x-1+x-2=3= 2x-3=3 ——————— 2x-3=3 Move the constant to the right-hand side and change its sign 2x=3+3 ———————————————————- 2x=3+3 Add the numbers
