解方程6×1.5+5X=1210-0.35X=7155X-14×6=7.5.-数学

题目简介

解方程6×1.5+5X=1210-0.35X=7155X-14×6=7.5.-数学

题目详情

解方程
6×1.5+5X=1210-0.35X=7
1
5
5X-
1
4
×6=7.5.
题型:解答题难度:中档来源:平凉

答案

(1)6×1.5+5x=12,
              9+5x=12,
            9+5x-9=12-9,
                5x=3,
             5x÷5=3÷5,
                 x=class="stub"3
5


(2)10-0.35x=7class="stub"1
5

10-0.35x+0.35x=7.2+0.35x,
     7.2+0.35x=10,
 7.2+0.35x-7.2=10-7.2,
         0.35x=2.8,
   0.35x÷0.35=2.8÷0.35,
             x=8;

(3)5x-class="stub"1
4
×6=7.5,
       5x-1.5=7.5,
   5x-1.5+1.5=7.5+1.5,
           5x=9,
        5x÷5=9÷5,
            x=1.8.

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