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
答
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.