N 1
( X - 4)/2 - ( 7 - X )/3 = 2
3( X - 4 ) - 2( 7 - X ) = 12
3x - 12 - 14 + 2x = 12
5x = 12 + 26
X = 38 : 5
X = 7,6
N 2
( 4x - 1 )/5 = 7/( 3х + 5 )
7•5 = ( 4х - 1)( 3х + 5 )
12х^2 + 20х - 3х - 5 = 35
12х^2 + 17х - 40 = 0
D = 289 + 1920 = 2209 = 47^2
X1 = ( - 17 + 47 ) : 24 = 1,25
X2 = ( - 17 - 47 ) : 24 = - 64/24 = - 16/6 = - 2 ( 2/3 )
ОДЗ : 3х + 5 не равен 0 ; 3х не равен - 5 ; х не равен - 1 ( 2/3 )
Ответ 1,25 ; - 2 ( 2/3 )