方程1.3×4+0.2x=6的解是(  ) A.x=56 B.x=0.16 C.x=4

问题描述:

方程1.3×4+0.2x=6的解是(  )
A. x=56
B. x=0.16
C. x=4

1.3×4+0.2x=6
       5.2+0.2x=6
   5.2+0.2x-5.2=6-5.2
           0.2x=0.8
      0.2x÷0.2=0.8÷0.2
              x=4.
故选:C.