Question

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resolva as equações a seguir:
x + 3 = 9
x + 15 = 40
x + 7 = 22
x - 5 = 19
3x + 12 = 2x + 20
6 x + 4 = 5x + 12
19 x -1 = 18 x + 5
12x + 8 = 11x +4
4 x = 1 = 2x + 15
7 x + 5 = 4x + 26
16 x + 3 = 10 x + 21
13 x + 7 = 11 x + 12 ​

Answer 1

✎ x + 3 = 9 ↔ x = 6

✎x + 15 = 40 ↔ x = 25

✎x + 7 = 22 ↔ x = 15

✎x - 5 = 19 ↔ x = 24

✎3x + 12 = 2x + 20 ↔ x = 8

✎6x + 4 = 5x + 12 ↔ x = 8

✎19x -1 = 18x + 5 ↔ x = 6

✎12x + 8 = 11x + 4 ↔ x = -4

✎7x + 5 = 4x + 26 ↔ x = 7

✎16x + 3 = 10x + 21 ↔ x = 3

✎13x + 7 = 11x + 12 ↔ x = 2,5

Explicação passo-a-passo:

x + 3 = 9

x = 9 - 3

x = 6

❏ ❐ ❑ ❒ ❏ ❐ ❏ ❐ ❑ ❒ ❏ ❐

x + 15 = 40

x = 40 - 15

x = 25

❏ ❐ ❑ ❒ ❏ ❐ ❏ ❐ ❑ ❒ ❏ ❐

x + 7 = 22

x = 22 - 7

x = 15

❏ ❐ ❑ ❒ ❏ ❐ ❏ ❐ ❑ ❒ ❏ ❐

x - 5 = 19

x = 19 + 5

x = 24

❏ ❐ ❑ ❒ ❏ ❐ ❏ ❐ ❑ ❒ ❏ ❐

3x + 12 = 2x + 20

3x - 2x = 20 - 12

1x = 8

x = 8/1

x = 8

❏ ❐ ❑ ❒ ❏ ❐ ❏ ❐ ❑ ❒ ❏ ❐

6x + 4 = 5x + 12

6x - 5x = 12 - 4

1x = 8

x = 8/1

x = 8

❏ ❐ ❑ ❒ ❏ ❐ ❏ ❐ ❑ ❒ ❏ ❐

19x -1 = 18x + 5

19x - 18x = 5 + 1

1x = 6

x = 6/1

x = 6

❏ ❐ ❑ ❒ ❏ ❐ ❏ ❐ ❑ ❒ ❏ ❐

12x + 8 = 11x + 4

12x - 11x = 4 - 8

1x = -4

x = -4/1

x = -4

❏ ❐ ❑ ❒ ❏ ❐ ❏ ❐ ❑ ❒ ❏ ❐

7x + 5 = 4x + 26

7x - 4x = 26 - 5

3x = 21

x = 21/3

x = 7

❏ ❐ ❑ ❒ ❏ ❐ ❏ ❐ ❑ ❒ ❏ ❐

16x + 3 = 10x + 21

16x - 10x = 21 - 3

6x = 18

x = 18/6

x = 3

❏ ❐ ❑ ❒ ❏ ❐ ❏ ❐ ❑ ❒ ❏ ❐

13x + 7 = 11x + 12

13x - 11x = 12 - 7

2x = 5

x = 5/2

x = 2,5

❏ ❐ ❑ ❒ ❏ ❐ ❏ ❐ ❑ ❒ ❏ ❐

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