2.

8 - 1,5 * (3х + 2) = 2/3 * (4 - 6х)

8 - 4,5х - 3 = 8/3 - 4х

4х - 4,5х = 8/3 - 8 + 3

-0,5х = 8/3 - 5

-0,5х = 8/3 - 15/3

-0,5х = -7/3

х = 7/3 : 0,5

х = 70/15 = 14/3 = 4целых 2/3

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3.

х = (5/3 * 4/3) : 10/3

х = 20/9 * 3/10

х = 2/3

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4.

-7 * (6х + 3) - 5 * (4 - х) = -42х - 21 - 20 + 5х = -37х - 41

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