解方程. 5.6+x=10 5x=1.3 x÷0.08=25 12x-3=10x+8.

问题描述:

解方程.
5.6+x=10       
5x=1.3      
x÷0.08=25      
12x-3=10x+8.

(1)5.6+x=10       
    5.6+x-5.6=10-5.6     
            x=4.4
(2)5x=1.3
  5x÷5=1.3÷5
      x=0.26
(3)x÷0.08=25      
x÷0.08×0.08=25×0.08   
            x=2
(4)12x-3=10x+8
12x-3-10x+3=10x+8-10x+3
         2x=11
      2x÷2=11÷2
          x=5.5