30Х-10(2+х)=х+4 6х/1+2х=5 18-8(х-2)=10-4х (4х+5)(2-4х)(х+7)=0,2

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The solutions to the given equations are as follows:

1) 30х - 10(2+х) = х + 4
30х - 20 - 10х = х + 4
20х - 20 = х + 4
19х = 24
x = 24/19

2) 6x/1 + 2x = 5
6x + 2x = 5
8x = 5
x = 5/8

3) 18 - 8(x-2) = 10 - 4x
18 -8x + 16 = 10 - 4x
34 - 8x = 10 - 4x
24 = 4x
x = 6

4) (4x + 5)(2 - 4x)(x + 7) = 0
Setting each factor to zero gives the solutions:
4x + 5 = 0 => 4x = -5 => x = -5/4
2 - 4x = 0 => -4x = -2 => x = 1/2
x + 7 = 0 => x = -7

Therefore, the solutions to the equation (4x + 5)(2 - 4x)(x + 7) = 0 are x = -5/4, 1/2, and -7.