Question

решить уравнения
(3X-6)*2,4=-2

0,5*(2X+1)=77

Answer 1

1) (3х-6)*2,4=-2
7,2х-14,4=-2
7,2х=14,4-2
7,2х=12,4
х=12,4:7,2=12 4/10:7 2/10=124/10:72/10=124/10*10/72=124/72=31/18
х=1 13/18
2)0,5*(2х+1)=77
1х+0,5=77
х=77-0,5
х=76,5.

Answer 2

(3x-6)*2,4=-2 --------------------------------------------------------- 7,2x-14,4=-2 --------------------------------------------------------- 7,2x=14,4-2 --------------------------------------------------------- 7,2x=12,4 --------------------------------------------------------- --------------------------------------------------------- --------------------------------------------------------- --------------------------------------------------------- 0,5*(2X+1)=77 --------------------------------------------------------- 2x+1=77/0,5 --------------------------------------------------------- 2x+1=154 --------------------------------------------------------- 2x=154-1 --------------------------------------------------------- 2x=153 --------------------------------------------------------- x=76,5 ---------------------------------------------------------