3×+1=11 2a+4=3a 6b+10=46 4t+3=6t 4x+12=3×+21 2y+13=5y+4 3×+1=11 2a+4=3a 6b+10=46 4t+3=6t 4x+12=3×+21 2y+13=5y+4