Verified answer

3x-32-x=23

2x=23+32

2x=55

x=27,5

15-2x

15 - 55 = - 40

Vejamos, se:

3x - 32 - x = 2 3

2x = 23 + 32

2x = 55

x = 55 / 2

x = 27,5

15 - x^2 = 0

___

x = V 15

x = + - 3,87298...

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