Question

Resolva as seguintes equações:
12) 7x – 2 + 4 = 10 + 5x
13) 6x = 2x + 16
14) 2x – 5 = x + 1
15) 2x + 3 = x + 4
16) 4x – 10 = 2x + 2
17) 5x – 3 + x = 2x + 9
18) 17x – 7x = x + 18
19) x + x – 4 = 17 – 2x + 1
20) 5x + 4 = 3x – 2x + 4​

Answer 1

Resposta:

Explicação passo- a - passo:

12) 7x - 2 + 4 = 10 + 5x

7x - 5x = 10 + 2 - 4

2x = 12 - 4

2x = 8

x = 8

2

| X = 4 |

13) 6x = 2x + 16

6x - 2x = 16

4x = 16

x = 16

4

| X = 4 |

14) 2x - 5 = x + 1

2x - x = 1 + 5

x = 6

| X = 6 |

15) 2x + 3 = x + 4

2x - x = 4 - 3

x = 1

| X = 1 |

16) 4x - 10 = 2x + 2

4x - 2x = 2 + 10

2x = 12

x = 12

2

| X = 6 |

17) 5x - 3 + x = 2x + 9

5x + x - 2x = 9 + 3

6x - 2x = 12

4x = 12

x= 12

4

| X = 3 |

18) 17x - 7x = x + 18

17x - 7x - x = 18

10x - x = 18

9x = 18

x = 18

9

| X = 2 |

19) x + x - 4 = 17 - 2x + 1

x + x + 2x = 17 + 1 + 4

2x + 2x = 18 + 4

4x = 22

x = 22

4

| X = 22 |

4

20) 5x - 4 = 3x - 2x + 1

5x - 3x + 2x = 1 + 4

2x + 2x = 5

4x = 5

x = 5

4

| X = 5 |

4

Espero ter ajudado!!!