问题
解答题
解方程.
0.4X﹦0.65+X﹦2.75 X-2.72=3.8X÷5.6=9.4.
答案
(1)0.4X﹦0.6,
0.4X÷0.4﹦0.6÷0.4,
x=1.5;
(2)5+X﹦2.75,
5+X-5﹦2.75-5,
x=2.25;
(3)X-2.72=3.8,
X-2.72+2.72=3.8+2.72,
x=6.52;
(4)X÷5.6=9.4,
X÷5.6×5.6=9.4×5.6,
x=52.64.