Question

Ayudenme con esto x favor y gracias

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Answer 1

Respuesta:

x=9

Explicación paso a paso:

5+13= 5x - 3x

18=2x

9=x

5x4 + 5x = 7x -2

20+5x=7x-2

20+2=7x-5x

22=2x

11=x

Answer 2

Explicación paso a paso:

2. a)

$5(4 + x) = 7x - 2 \\ 20 + 5x = 7x - 2 \\ 5x - 7x = - 2 - 20 \\ - 2x = - 22 \\ x = \frac{ - 22}{ - 2} \\ x = 11$

b)

$3x + 5 = 5x - 13 \\ 3x - 5x = -13 - 5 \\ - 2x = - 18 \\ x = \frac{ - 18}{ - 2} \\ x = 9$

c)

$2x + 7x - 5x = 8 + x - 1 \\ 5x - 5x = 7 + x \\ - 7 = x$

2.a)

$5(4 + x) = 7x - 2 \\ 20 + 5x = 7x - 2 \\ - 7x + 5x = - 2 - 20 \\ - 2x = - 22 \\ x = 11$

b)

$3(2x + 5) - 2(4 + 4x) = 7 \\ 6x + 15 - 8 - 8x = 7 \\ - 2x = 7 - 15 + 8 \\ - 2x = 0 \\ x = 0$

c)

$7(3x + 2) - 5(4x - 3) = 4(x - 2) + 1 \\ 21x + 14 - 20x + 15 = 4x - 8 + 1 \\ x + 29 = 4x - 7 \\ x - 4x = - 7 - 29 \\ - 3x = - 36 \\ x = \frac{ - 36}{ - 3} \\ x = 12$