Question

alguien me puede ayudar?​

Answer 1

9x +3 = 21

9x = 21 -3

9x = 18

x =18/9

x = 2

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2x - 10 = 4

2x = 4 + 10  

2x = 14

x = 14/2

x = 7

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5x + 3 = - 12

5x = -12 - 3

5x = -15

x = - (15/5)

x = -3

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-7x + 9 = -5

-7x = -5 - 9

-7x = -14

x = 14/ 7

x = 2

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-6x - 4 = 20

-6x = 20 + 4

-6x = 24

x = - (24/6)

x = -4

De nada ;:v