Question

(1.4x＋11.2)÷5＝1.4x÷3

急！是题目错了吗？注意要用小学五年级的方法

Answer 1

题目没错，一步一步的解
(1.4x＋11.2)÷5＝1.4x÷3
1.4x+11.2=1.4x÷3*5
1.4x+11.2=7x/3
14x/10+11.2=7x/3
42x/30+11.2=70x/30
70x/30-42x/30=11.2
（70/30-42/30）*x=11.2
28x/30=11.2
28x=11.2*30
x=11.2*30/28
x=12

Answer 2

(1.4x＋11.2)÷5＝1.4x÷3
(1.4x+11.2)x1/5=1.4x÷3
(1.4x+11.2)x1/5x3=1.4x
(1.4x+11.2)x3/5=1.4x
1.4xx3/5+11.2x3/5=1.4x
4.2x/5+33.6/5=1.4x
(4.2x+33.6)/5=1.4x
4.2x+33.6=1.4xx5
4.2x+33.6=7x
33.6=7x-4.2x
2.8x=33.6
x=33.6÷2.8
x=12

Answer 3

解答在附件里，不懂可以追问，懂了请采纳！

Answer 4

1.4x+11.2=1.4x/3*5
x=12

Answer 5

如果是小学的，那就是错误的。因为最后结果是负数

Answer 6