а) 6(8х+5)=0
(8х+5)=0 ; 8x = -5 ; x =-5/8
проверка 6(8*-5/8+5)=0 ; 6(-5+5) =6*0 = 0б) 6(8х+5)=-6
(8х+5)=-1 ; 8x =-6 ; x =-6/8 =-3/4
проверка 6(8*-6/8+5)=0 ; 6(-6+5) =6*-1 = -6в) (3х+5)+(8х+1)=17
11х+6 =17 ; 11x = 11 ; x=1
проверка (3*1+5)+(8*1+1)= 8+9=17г) 19-5(3х-1)=9
10 =5(3х-1) ; 2 =(3х-1) ; 3 =3x ; x=1
проверка 19-5(3*1-1)=19-5(3-1)=19-10=9д) 30+5(3х-1)=35х-25
30+15х-5=35х-25 ; 50 = 20x ; x =50/20=5/2=2.5
проверка
30+5(3*2.5-1)=35*2.5-25
26.5 = 62.5е) -10(3-4х)+51=7(5х+3)
-30+40х+51=35х+21 ; 5x =0 ; x= 0
-10(3-4*0)+51=7(5*0+3)
а) 6(8х+5)=0
(8х+5)=0 ; 8x = -5 ; x =-5/8
проверка 6(8*-5/8+5)=0 ; 6(-5+5) =6*0 = 0
б) 6(8х+5)=-6
(8х+5)=-1 ; 8x =-6 ; x =-6/8 =-3/4
проверка 6(8*-6/8+5)=0 ; 6(-6+5) =6*-1 = -6
в) (3х+5)+(8х+1)=17
11х+6 =17 ; 11x = 11 ; x=1
проверка (3*1+5)+(8*1+1)= 8+9=17
г) 19-5(3х-1)=9
10 =5(3х-1) ; 2 =(3х-1) ; 3 =3x ; x=1
проверка 19-5(3*1-1)=19-5(3-1)=19-10=9
д) 30+5(3х-1)=35х-25
30+15х-5=35х-25 ; 50 = 20x ; x =50/20=5/2=2.5
проверка
30+5(3*2.5-1)=35*2.5-25
26.5 = 62.5
е) -10(3-4х)+51=7(5х+3)
-30+40х+51=35х+21 ; 5x =0 ; x= 0
проверка
-10(3-4*0)+51=7(5*0+3)
21 = 21