解方程: x-65%x=70 120%x-x=0.8 49+40%x=89.

发布时间:2021-02-18 00:45:13

解方程:x-65%x=70 120%x-x=0.8 49+40%x=89.

网友回答

(1)x-65%x=70,
           35%x=70,
      35%x÷35%=70÷35%,
              x=200;
(2)120%x-x=0.8,
        20%x=0.8,
   20%x÷20%=0.8÷20%,
           x=4;
(3)49+40%x=89,
  49+40%x-49=89-49,
        40%x=40,
   40%x÷40%=40÷40%,
           x=100.
======以下答案可供参考======
供参考答案1:
x-65%x=70 0.35x=70 x=200
120%x-x=0.8 0.2x=0.8 x=4
49+40%X=89 0.4x=40 x=100
供参考答案2:
0.35x=70
x=70/0.35
x=2000.2x=0.8
2x=8x=40.4x=89-49
x=40/0.4
x=100 x-65%x=70 0.35x=70 x=200
120%x-x=0.8 0.2x=0.8 x=4
49+40%X=89 0.4x=40 x=100
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