100 - 7 . ( x - 5 ) = 58
7 . ( x - 5 ) = 100 - 58
7 . ( x - 5 ) = 42
( x - 5 ) = 42 : 7
( x - 5 ) = 6
x = 6 + 5
x = 11
100 - 7 x ( x - 5 ) = 58
7 x ( x - 5 ) = 100 - 58
7 x ( x - 5 ) = 42
x - 5 = 42 : 7
x - 5 = 6
x = 6 + 5
x = 11
100-7.[x-5]=58
93.[x-5]=58
x-5=58:93
x-5=0,58
x=5,58