помогите решить, срочно.
Ответы
Ответ:
1) 8-4х = 2х-16
-4х - 2х = - 16 - 8
-6х = -24
х = 4
2) 4(х-6) = х-9
4х - 24 = х - 9
4х - х = -9 + 24
3х = 15
х = 5
3) 6-3(х+1) = 7-2х
6-3х-3 = 7-2х
3-3х=7-2х
-3х+2х=7-3
-х=4
х = -4
4) (8х+3)-(10х+6) = 9
8х+3-10x-6=9
-2x-3=9
-2x=9+3
-2x=12
x = -6
5/6) 3/5( 7/9x - 1/3 ) = x-2 1/3
7/15x - 1/5 = x - 7/3
7x - 3 = 15x - 35
7x - 15x = -35 + 3
-8x = -32
x = 4
7) 8 ( 5 - 3x ) = 6 ( 2 - 4x ) + 7
40 - 24x = 12 - 24x + 7
40 = 12 + 7
40 = 19
ответа нет/ корней нет
8) 5(x-12) = 6(x-10) - x
5x - 60 = 6x - 60 - x
5x = 6x - x
5x = 5x
x є R
9) (12y+18) (1,6 - 0,2y) = 0
(12y + 18 ) * ( 8/5 - 1/5y) = 0
12y + 18 = 0; 8/5 - 1/5y = 0
y = -3/2; y = 8
y1 = -3/2; y2 = 8
10) 1,2 ( 5x - 2 ) = 8 - ( 10,4 - 6x )
6x - 2,4 = 8 - 10,4 + 6x
-2,4 = 8 - 10,4
-2,4 = -2,4
x є R