问题 解答题
求未知数X.
X÷0.83=2.3X×0.34=177.08-X=5.19.
答案

(1)X÷0.83=2.3,

X÷0.83×0.83=2.3×0.83,

x=1.909;

(2)X×0.34=17,

X×0.34÷0.34=17÷0.34,

x=50;

(3)7.08-X=5.19,

7.08-X+X=5.19+X,

5.19+X=7.08,

5.19+X-5.19=7.08-5.19,

X=1.89.

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