Question

ДАЮ 20 БАЛОВ БОЛЬШЕ НЕТ ТОЛЬКО БИСТРЕЙ
1) 4(х-5)=3х
4) 2(3х+5)-3(4х-1)=11,8
2) 2(х+3)=3(х-4)
5) 12-4(х-3)=3(13-3х)
3) -(3х+1)=2х
6) -0,3(3-х)=0,3х+0,3(5х+2)

Answer 1

Ответ:

$4(x - 5) = 3x \\ 4x - 20 = 3x \\ x = 20$

$2(3x + 5) - 3(4x - 1) = 11.8 \\ 6x + 10 - 12x + 3 = 11.8 \\ 6x = 13 - 11.8 \\ 6x = 1.2 \\ x = 0.2$

$2(x + 3) = 3(x - 4) \\ 2x + 6 = 3x - 12 \\ x = 18$

$12 - 4(x - 3) = 3(13 - 3x) \\ 12 - 4x + 12 = 39 - 9x \\ 5x = 15 \\ x = 3$

$- 3x - 1 = 2x \\ 5x = - 1 \\ x = - 0.2$

$- 0.3(3 - x) = 0.3x + 0.3(5x + 2) \\ x - 3 = x + 5x + 2 \\ 5x = - 5 \\ x = - 1$