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Ответ:

√3x + 5 = 4

(√3x + 5)² = 16

3x + 5 = 16

3x = 11

x = 3.66

√x + 3 = 2x + 5

(√x + 3)² = (2x + 5)²

x + 3 = 4x + 20x + 25

x - 4x - 20x = 25 - 3

-23x = 22

x = - 22/23