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a) 2(x + 3) = 10 d) 3(1-x) + 2 = -7 b) 3(x - 1) +2 = 8 e) 5-2(x + 2) = 9 g) 9 = 5-4(2x-5) hj 0 = 6 -3(5 + 2x) i) -1 = -4+201 -5x) c) 2(13-X)-9=1 f) -2-(4-3x) = -7
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a)

2(x + 3) = 10

2x + 6 = 10

2x = 10 - 6

2x = 4 | : 2

x = 2

b)

3(x - 1) +2 = 8

3x - 3 + 2 = 8

3x = 8 + 3 - 2

3x = 9 | : 3

x = 3

c)

2(13 - x)-9 = 1

26 - 2x - 9 = 1

-2x = 1 - 26 + 9

-2x = -16 | : (-2)

x = 8

d)

3(1 - x ) + 2 = -7

3 - 3x + 2 = -7

-3x = -7 - 3 - 2

-3x = -12 | : (-3)

x = 4

e)

5 - 2(x + 2) = 9

5 - 2x - 4 = 9

-2x = 9 - 5 + 4

-2x = 8 | : (-2)

x = -4

f)

-2 - (4 - 3x) = -7

-2 - 4 + 3x = -7

3x = -7 + 2 + 4

3x = -1 | : 3

x = - 1/3

g)

9 = 5 - 4(2x-5)

9 = 5 - 8x + 20

8x = 5 + 20 - 9

8x = 16 | : 8

x = 2

h)

0 = 6 - 3(5 + 2x)

0 = 6 - 15 - 6x

6x = 6 - 15

6x = -9 | : 6

x = -9/6

x = - 3/2

x = -1 1/2

i)

-1 = -4 + (201 -5x)

-1 = -4 + 201 - 5x

5x = -4 + 201 + 1

5x = 198 | : 5

x = 198/5

x = 39 3/5

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