问题
解答题
求未知数x
12.8+4x=48
0.6:2.5=6:x.
答案
(1)12.8+4x=48,
12.8+4x-12.8=48-12.8,
4x=35.2,
4x÷4=35.2÷4,
x=8.8;
(2)0.6:2.5=6:x,
0.6x=2.5×6,
0.6x÷0.6=2.5×6÷0.6,
x=25.
求未知数x
12.8+4x=48
0.6:2.5=6:x.
(1)12.8+4x=48,
12.8+4x-12.8=48-12.8,
4x=35.2,
4x÷4=35.2÷4,
x=8.8;
(2)0.6:2.5=6:x,
0.6x=2.5×6,
0.6x÷0.6=2.5×6÷0.6,
x=25.