题目内容

解方程
(1) 35 -2.5x=5 (2)6×2.5+8x=23
(3) 1.2x+1.3x-8=4.6 (4)(2.5 +x)×1.4= 11.9
(1)解: 35 -2.5x=5
                      2.5x=30
                          x=12
(2)解:6×2.5+8x=23
                            8x=23-15
                              x=1
(3)解:1.2x+1.3x-8=4.6
                           2.5x=12.6
                               x=5.04
(4)解:(2.5 +x)×1.4= 11.9
                                  1.4x=11.9-3.5
                                      x=6
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