Question

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4x – 2 = 4 + 2x – 1
5 – x – 7x = 3x – 15
7x – 3x – 2 = 3x + 4
8x – 4 – 15x – 6 + 5 = 0
–3(1 – 2x) – 9x = – (5x – 12)
4.(5x – 3) – 3.(7x – 2) + 5 = 0
–5.(3 – 2x) – 7x = 3 (5x – 5)
9x – 3.(x – 2) = 3.(x + 4)

Answer 1

A)

4x - 2x = 3 + 2

2x = 5

x = 5/2

B)

-8x - 3x = - 15 - 5

- 10x = - 20 (-1)

10x = 20

x = 2

C)

4x - 3x = 4 + 2

x = 6

D)

-7x = -5 +6 + 4

-7x = -5 + 10

-7x = 5 (-1)

7x = 5

x = 7/5

E)

-3 +6x -9x = -5x + 12

6x - 9x +5x = 12 + 3

2x = 15

x = 7,5

F)

20x - 12 - 21x + 6 + 5 = 0

20x - 21x = -5 - 6 + 12

-x = 1 (-1)

x = -1

G)

-15 + 10x - 7x = 15x - 15

-15x + 10x - 7x = - 15 + 15

-22x + 10x = 0

-12x = 0

x = 0

H)

9x - 3x + 6 = 3x + 12

+ 9x - 3x - 3x = 12 - 6

9x - 6x = 6

3x = 6

x = 2

Answer 2

Oie, Td Bom?!

1.

$4x - 2 =4 + 2x - 1$

$4x - 2 = 3 + 2x$

$4x - 2x = 3 + 2$

$2x = 5$

$x = \frac{5}{2}$

$x = 2,5$

2.

$5 - x - 7x = 3x - 15$

$5 - 8x = 3x - 15$

$- 8x - 3x = - 15 - 5$

$- 11x = - 20$

$x = \frac{ - 20}{ - 11}$

$x = \frac{20}{11}$

$x≈1,818$

3.

$7x - 3x - 2 = 3x + 4$

$4x - 2 = 3x + 4$

$4x - 3x = 4 + 2$

$x = 6$

4.

$8x - 4 - 15x - 6 + 5 = 0$

$- 7x - 5 = 0$

$- 7x = 5$

$x = - \frac{5}{7}$

$x ≈0,714...$

5.

$- 3(1 - 2x) - 9x = - (5x - 12)$

$- 3 + 6x - 9x = - 5x + 12$

$- 3 - 3x = - 5x + 12$

$- 3x + 5x = 12 + 3$

$2x = 15$

$x = \frac{15}{2}$

$x = 7,5$

6.

$4(5x - 3) - 3(7x - 2) + 5 = 0$

$20x - 12 - 21x + 6 + 5 = 0$

$- x - 1 = 0$

$- x = 1 \: . \: ( - 1)$

$x = - 1$

7.

$- 5(3 - 2x) - 7x = 3(5x - 5)$

$- 15 + 10x - 7x = 15x - 15$

$10x - 7x = 15x$

$3x = 15x$

$3x - 15x = 0$

$- 12x = 0$

$x = - \frac{0}{ 12}$

$x = 0$

8.

$9x - 3(x - 2) = 3(x + 4)$

$9x - 3x + 6 = 3x + 12$

$6x + 6 = 3x + 12$

$6x - 3x = 12 - 6$

$3x = 6$

$x = \frac{6}{3}$

$x = 2$

Att. Makaveli1996