Решить уравнения (3X-6)*2,4=-2 0,5*(2X+1)=77
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.
(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 ---------------------------------------------------------