问题
解答题
解方程(需检验)
(1)X+1.3=2.63(2)X-4.53×5=8.57 (3)1.25X-0.16X=3.488.
答案
(1)X+1.3=2.63,
x+1.3-1.3=2.63-1.3,
x=1.33;
(2)X-4.53×5=8.57
x-22.65=8.57,
x-22.65+22.65=8.57+22.65,
x=31.22;
(3)1.25X-0.16X=3.488,
1.09X=3.488,
1.09x÷1.09=3.488÷1.09,
x=3.2.