Question

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Answer 1

a)

x - 3 = 7

x = 7 + 3

x = 10

b)

x + 4 = 10

x = 10 - 4

x = 6

c)

x + 101 = 300

x = 300 - 101

x = 199

d)

x - 279 = 237

x = 237 + 279

x = 516

e)

x - 8 = - 10

x = - 10 + 8

x = - 2

f)

x + 9 = - 1

x = - 1 - 9

x = - 10

g)

3x = 12

x = 12 / 3

x = 4

h)

9x = 18

x = 18 / 9

x = 2

i)

35x = - 105

x = - 105 / 35

x = - 3

j)

7x - 1 = 13

7x = 13 + 1

7x = 14

x = 14 / 7

x = 2

k)

6x - 10 = 2x + 14

6x - 2x = 14 + 10

4x = 24

x = 24 / 4

x = 6

l)

6x = 2x + 28

6x - 2x = 28

4x = 28

x = 28 / 4

x = 7

m)

3 ( x + 2) = 1

3x + 6 = 1

3x = 1 - 6

3x = - 5

x = - 5 / 3

x = 1,666...

n)

5 (x + 4) = x + 3

5x + 20 = x + 3

5x - x = 3 - 20

4x = - 17

x = - 17 / 4

x = - 4,25