Question

下列方程变形正确的是( )A.由-2x=3得x=-23B.由x+x-12=x+...

下列方程变形正确的是( )A.由-2x=3得x=-23B.由x+x-12=x+33得x+3(x-1)=2(x+3)C.由1.3x0.3-1.5-x0.2=0.5得13x3-15-10x2=5D.由-2+3x=4x得4x-3x=-2

Answer 1

A、系数化为1得,x=-
3
2
,故错误;
B、去分母得,6x+3(x-1)=2(x+3),故错误;
C、根据分式的基本性质得,
13x
3
-
15-10x
2
=0.5,故错误;
D、移项得,-2=4x-3x,即4x-3x=-2,故正确.
故选D.