Question

Resolva as seguintes equações do 1º grau: 


7x – 4 = 5x + 6

10 + 3x = 2x + 9

5x + 2 – x + 8 = 0

5y – 13 = 7y – 19

2x + 7 – x = 3 – 4x

11 – x + 5 = 4x + 22 – 6x

y + 3 + 2y – 5y + y – 11 = 0

x + 12 + x = 12 - x

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Answer 1

Resposta e explicação passo a passo:

7x – 4 = 5x + 6

7x - 5x = 6 + 4

2x = 10

x = 10/2

x = 5

10 + 3x = 2x + 9

3x - 2x = 9 - 10

x = -1

5x + 2 – x + 8 = 0

5x - x = -8 - 2

4x = -10

x = -10/4

x = -5/2

5y – 13 = 7y – 19

5y - 7y = -19 + 13

-2y = -6

-y = -6/2

-y = -3

y = 3

2x + 7 – x = 3 – 4x

2x - x + 4x = 3 - 7

5x = -4

x = -4/5

11 – x + 5 = 4x + 22 – 6x

-x - 4x + 6x = 22 - 11 - 5

x = 6

y + 3 + 2y – 5y + y – 11 = 0

y + 2y - 5y + y = -3 + 11

-y = 8

y = -8

x + 12 + x = 12 - x

x + x + x = 12 - 12

3x = 0

x = 0/3

x = 0