Question

3*8+1-{4+[15*(8-5x)+23]:4}=4

Answer 1

3 × 8 + 1 - { 4 + [ 15 × ( 8 - 5 x) + 23 ] : 4} = 4
24 + 1 - { 4 + [ 15 x ( 8 - 5 x ) + 23 ] : 4 } = 4
25  - { 4 + [ 15 x ( 8 - 5 x ) + 23 ] : 4 } = 4
 4 + [ 15 x ( 8 - 5 x ) + 23 ] : 4 = 25 - 4 
 4 + [ 15 x ( 8 - 5 x ) + 23 ] : 4  = 21
[ 15 x ( 8 - 5 x ) + 23 ] : 4 = 21 - 4
[ 15 x ( 8 - 5 x ) + 23 ] : 4 = 17
15 x ( 8 - 5 x ) + 23 = 17 x 4 
15 x ( 8 - 5 x ) + 23 = 68
15 x ( 8 - 5 x ) = 68 - 23
15 x ( 8 - 5 x ) = 45
8 - 5 x = 45 : 15
8 - 5 x = 3
5 x = 8 - 3
5 x = 5 
x = 5 : 5
x = 1