Question

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Answer 1

x = - 7

Explicación paso a paso:

3 -[2x - (6 - 5x) + 1] = 3(12 - x)

3 -[2x + 5x - 6 + 1] = 3(12 - x)

3 -[ 7x - 5] = 3(12 - x)

3 -7x - 5 = 3(12 - x)

- 7x + 8 = 36 - 3x

- 7x + 3x = 36 - 8

- 4x = 28

x = 28 / - 4

x = - 7

Verificación:

3 -[2(-7) - (6 - 5(-7)) + 1] = 3(12 - (-7))

3 -[-14 - (6 + 35) + 1] = 36 - (-21)

3 -[-14 - 41 + 1] = 36 + 21

3 -[-55 + 1] = 57

3 - [-54] = 57

3 + 54 = 57

57 = 57