Respuesta:
(25+3x).2 = 86
50 + 6x = 86
6x = 86-50
6x = 36
x = 36:6
x = 6
(4+x):2 = 7
4+x/2 = 7
4+x = 14
x = 14-4
x = 10
5+x:2 = 14
5+1/2x = 14
10+x = 28
x = 28-10
x = 18
1+3x-10 = 0
3x = 0-1+10
3x = 9
x = 9:3
x = 3
3(x-8)+1 = 40
3x-24+1 = 40
3x = 40+24-1
3x = 63
x = 63:3
x = 21
5x-5 = 0
5x = 0+5
x = 5:5
x = 1
de nada crack, espero la coronita almenos:)
