Question

3. Розв'яжіть рівняння:

1) 10x - 3 = 17x + 25 :

2) 8(5 - 2x) = 6(2 - 4x) + 4

3) 1.2(2x - 3) = 0.5(4x + 3) :

8) 7 1/3 * x - 1 1/6 * (2x - 1.5) = 6 2/3 * (1 1/6 * x - 1 2/15)

5) 3(x + 2 1/3) - 20 =x+7:

7) (2x)/3 - 1/8 = (5x)/6

6) (x - 3)/7 = (x + 5)/3

4) 1/6 * x - 0.4 = 1, 5x + 2/3

Answer 1

Відповідь:

10x - 3 = 17x + 25

-7x = 28

x = -4

8(5 - 2x) = 6(2 - 4x) + 4

40 - 16x = 12 - 24x + 4

8x = 32

x = 4

1.2(2x - 3) = 0.5(4x + 3)

2.4x - 3.6 = 2x + 1.5

0.4x = 5.1

x = 12.75

1/6 * x - 0.4 = 1.5x + 2/3

-1.5x + 1/6 * x = 0.4 + 2/3

-1.33x = 1.47

x ≈ -1.10

3(x + 2 1/3) - 20 = x + 7

3x + 7 - 20 = x + 7

2x = 6

x = 3

(x - 3)/7 = (x + 5)/3

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

3x - 9 = 7x + 35

-4x = 44

x = -11

(2x)/3 - 1/8 = (5x)/6

16x - 3 = 40x

-24x = -3

x = 1/8

7 1/3 * x - 1 1/6 * (2x - 1.5) = 6 2/3 * (1 1/6 * x - 1 2/15)

23/3 * x - 7/6 * 2x + 7/8 = 20/3 * x - 26/15

23/3 * x - 7/3 * x + 7/8 = 20/3 * x - 26/15

10/3 * x = 7/40

x = 21/400

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