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X+XX12=260
We move all terms to the left:
X+XX12-(260)=0
We move all terms containing X to the left, all other terms to the right
X+XX12=260
| -75=-16t2 | | 915=c-403 | | -75=-16t^2 | | 80+24+x=180 | | 48+62+x=180 | | −8=2h−14 | | u/18=21 | | 2x+12=x^2-6x+28 | | 110+x+41=180 | | 11t+(-1.5)=31.5 | | 7x–5x=6. | | 53+48+x=180 | | -26=m/4 | | 2x+12=x2-6x+28 | | 4.40•x=3.5x | | 12t+(-2)=34 | | 60÷10=n⋅3 | | -5d+18+3D=20 | | r/19=25 | | 25−3x= |