问题
解答题
求未知数x
X-9.2+7.59=16.28;
12:5=X:(9-0.5).
答案
(1)X-9.2+7.59=16.28,
x-1.61=16.28,
x-1.61+1.61=16.28+1.61,
x=17.89;
(2)12:5=X:(9-0.5),
5x=12×(9-0.5),
5x=102,
5x÷5=102÷5,
x=20.4.
求未知数x
X-9.2+7.59=16.28;
12:5=X:(9-0.5).
(1)X-9.2+7.59=16.28,
x-1.61=16.28,
x-1.61+1.61=16.28+1.61,
x=17.89;
(2)12:5=X:(9-0.5),
5x=12×(9-0.5),
5x=102,
5x÷5=102÷5,
x=20.4.