Розв'яжіть рівняння: 1) 3(x−4) − x = 4x+6x-5; 3) 0,4(0,5-6x)=6x+8,6. 2) -7(x-5)=10-(3x+4);​

1)
3(x - 4) - x = 4x + 6x - 5

3x - 12 - x = 10x - 5

2x - 12 = 10x - 5

2x - 10x = 12 - 5

-8x = 7

x = -7/8

2)

-7(x - 5) = 10 - (3x + 4)

-7x + 35 = 10 - 3x - 4

-7x + 35 = -3x + 6

-7x + 3x = 6 - 35

-4x = -29

x = 29/4

3)

0.4(0.5 - 6x) = 6x + 8.6

4(0.5 - 6x) = 60x + 86

2 - 24x = 60x + 86

-24x - 60x = 86 - 2

-84x = 84

x = -1