解方程 (1)2.6+3.4x=2

解方程 (1)2.6+3.4x=23 (2)12.3÷x=8.2 (3)2x-12+3=26 (4)21.3x-18.8x=1

(1)2.6+3.4x=23
               3.4x=23-2.6
                   x=6
(2)12.3÷x=8.2
                  x=12.3÷8.2
                  x=1.5
(3)2x-12+3=26
                  2x=35
                   x=17.5
(4)21.3x-18.8x=1
                     2.5x=1
                         x=0.4

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