题目内容

解方程。
(1)x-89=36.2 (2)x÷1.3= 4.7 (3)29x+4.3=7.2
(4)6x+3×8=90 (5)0.5(x-1.2)=2 (6)65x÷(2.8+2.2)=15.6
(1)x-89=36.2
             x=125.2
 
(2)x÷1.3= 4.7
                 x=6.11
 
(3)29x+4.3=7.2
                29x=2.9
                    x=0.1
(4)6x+3×8=90
            6x+24=90
                  6x=66
                    x=11
(5)0.5(x-1.2)=2
                    x-1.2= 4
                          x=5.2
 
(6)65x÷(2.8+2.2)=15.6
                         65x÷5=15.6
                               65x=78
                                  x=1.2
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