1/9{7【1/5(x+4)+1】-5}=1 (4x-7)/5-(5x-4)/2=(14-x)/4

问题描述:

1/9{7【1/5(x+4)+1】-5}=1 (4x-7)/5-(5x-4)/2=(14-x)/4

数学之美团为你解答
1/9{7 [1/5(x+4)+]-5}=1
7 [ 1/5(x+4)+1 ] - 5 = 9
1/5(x+4)+1 = 2
x+4 = 5
x = 1
(4x - 7)/5 - (5x-4)/2 = (14 - x)/4
同乘以 20
4(4x-7) - 10(5x-4) = 5(14-x)
16x - 28 - 50x + 40 = 70 - 5x
- 29x = 58
x = - 2