Решите уравнения 1 а (3х+5)+(8х+1)=17 б 19-5(3х-1)=9 2 а 30+5(3х-1)-35х-25 б 10х-5=6(8х+3)-5х 3 а 6(8х+5)=0 б 6(8х+5)

1 . а ) (3х+5)+(8х+1)=17 ; 3 x + 5 + 8 * x + 1 = 17 ; 11 * x + 6 = 17 ; 11 * x = 17 - 6 ; 11 * x = 11 ; x = 1 ; б ) 19-5(3х-1)=9 ; 19 - 15 * x + 5 = 9 ; - 15 * x = 9 - 19 - 5 ; - 15 * x = - 15 ; x = 1 ; 2. а ) 30+5(3х-1)-35х-25 = 0 ; 30 + 15 * x - 5 - 35 * x - 25 = 0 ; - 20 * x + 0 = 0 ; x = 0 ;б ) 10х-5=6(8х+3)-5х ; 10 x - 5 = 48 x + 18 - 5 x ; 10 * x - 5 = 43 x + 18 ; 10 * x - 43 * x = 18 + 5 ; - 33 * x = 23 ; x = - 23 / 33 ; 3. а ) 6(8х+5)=0 ; 48 * x + 30 = 0 ; x = - 30 / 48 ; x = - 10 / 16 ; x = - 5 / 8 ; б ) 6(8х+5) = - 6 ; 8 * x + 5 = - 1 ; 8 * x = - 6 ; x = - 6 / 8 ; x = - 3 / 4 ; c )(3-5,8х)-(2,2х+3)=16 ; 3 - 5 . 8 x - 2 . 2 x - 3 = 16 ; - 5 . 8 x - 2 . 2 x = 16 ; - 8 *x = 16 ; x = - 2 ; d ) 21=-20-8(2х-0,5) ; 21 = - 20 - 16 x + 4 ; 21 = - 16 - 16 * x ; 16 * x = - 16 - 21 ; 16 * x = - 37 ; x = 37 / 16 ; e ) -10(3-4х)+51=7(5х+3) ; - 30 + 40 x + 51 = 35 x + 21 ; 21 + 40 * x = 35 * x + 21 ; 5 * x = 0 ; x = 0 ; f ) 6х-5(3х+2)=5(х-1)-8 ; 6 * x - 15 x - 10 = 5 x - 5 - 8 ; - 9 x - 10 = 5 * x - 13 ; - 14 x = - 3 ; x = 3 / 14 ; g ) -8(2х-0,5)=0 ; - 16 x + 4 = 0 ; - 16 x = - 4 ; x = 4 / 16 ; x = 1 / 4 ; x = 0 . 25 ; k ) -8(2х-0,5)=-8 ; 2 * x - 0 . 5 = 1 ; 2 * x = 3 / 2 ; 4 * x = 3 ; x = 3 / 4.