Question

Ayudaaaaaa por favor ​

Answer 1

Respuesta:

a) x = 3

b) x = 9

c) x = 4

d) x= 7

e) x = 7

f) x = 1

g) x = 6

Explicación paso a paso:

Resolución:

a)

2x = 6

x = 6 ÷ 2

x = 3

b)

2x - 3 = 6 + x

2x - x = 6 + 3

x = 9

c)

2(2x - 3) = 6 + x

4x - 6 = 6 + x

4x - x = 6 + 6

3x = 12

x = 12 ÷ 3

x = 4

d)

4(x - 10) = -6(2 - x) - 6x

4x - 40 = - 12 + 6x - 6x

4x = - 12 + 40

4x = 28

x = 28 ÷ 4

x = 7

e)

$\frac{x-1}{6}-\frac{x-3}{2} = -1\\ \frac{x-1-3x+9}{6} = -1\\ \frac{-2x+8}{6} = -1\\-2x+8 = -1*6\\-2x+8=-6\\8 + 6 = 2x\\14 = 2x\\14 / 2 = x\\7 = x$

f)

2(x + 1) - 3(x - 2) = x + 6

2x + 2 - 3x + 6 = x + 6

- x + 8 = x + 6

8 - 6 = x + x

2 = 2x

2 ÷ 2 = x

1 = x

g)

$\frac{x-1}{4} - \frac{x-5}{36} = \frac{x+5}{9} \\\frac{9x - 9 - x + 5}{36} = \frac{x+5}{9} \\\frac{8x - 4}{36} = \frac{x+5}{9} \\9(8x - 4) = 36(x + 5)\\72x - 36 = 36x + 180\\72x - 36x = 180 + 36\\36x = 216\\x = 216 / 36\\x = 6$