问题
解答题
解方程:
4X+12=40
0.4X+25%X=26.
答案
(1)4X+12=40,
4X+12-12=40-12,
4X=28,
4X÷4=28÷4,
X=7;
(2)0.4X+25%X=26,
0.65X=26,
0.65X÷0.65=26÷0.65,
X=40.
解方程:
4X+12=40
0.4X+25%X=26.
(1)4X+12=40,
4X+12-12=40-12,
4X=28,
4X÷4=28÷4,
X=7;
(2)0.4X+25%X=26,
0.65X=26,
0.65X÷0.65=26÷0.65,
X=40.