题目内容

解方程。
(1)x+= (2)-x=
(3)x+=+ (4)x-(+)=
(5)-x-= (6)x--=3.2
(7)3.2x-0.6×0.8= 4.32 (8)1.3x+1.4x=54
(9)(x-1.3)÷2=2.2 (10)6.25×4.4-0.5x=17
(1)x+=
                x=
(2)-x=
              x=
(3)x+=+
         x+=
                x=
(4)x-(+)=
                      x-=
                          x=
(5)-x-=
                   x=-
                   x=
(6)x--=3.2
                x-=3.2
                     x=3.7
(7)3.2x-0.6×0.8= 4.32
               3.2x-0.48= 4.32
                       3.2x= 4.8
                            x=1.5
(8)1.3x+1.4x=54
                 2.7x=54
                      x=20
(9)(x-1.3)÷2=2.2
                     x-1.3= 4.4
                           x=5.7
(10)6.25×4.4-0.5x=17
                   27.5-0.5x=17
                               x=21
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