问题
解答题
解方程.
①4x÷5=1.2②5-0.6x=2.24.
答案
①4x÷5=1.2,
4x÷5×5=1.2×5,
4x=6,
4x÷4=6÷4,
x=1.5;
②5-0.6x=2.24,
5-0.6x+0.6x=2.24+0.6x,
2.24+0.6x=5,
2.24-2.24+0.6x=5-2.24,
0.6x=2.76,
0.6x÷0.6=2.76÷0.6,
x=4.6.
解方程.
①4x÷5=1.2②5-0.6x=2.24.
①4x÷5=1.2,
4x÷5×5=1.2×5,
4x=6,
4x÷4=6÷4,
x=1.5;
②5-0.6x=2.24,
5-0.6x+0.6x=2.24+0.6x,
2.24+0.6x=5,
2.24-2.24+0.6x=5-2.24,
0.6x=2.76,
0.6x÷0.6=2.76÷0.6,
x=4.6.