Question

me ajudem por favor (Equações)

X + 2 = 10

2 . X = 12

4 X = - 20

X + 5 = 15

X - 5 = 10

5 X + 8 = 5 + 2 X

4 X + 2 X = 10 +6 + X

3 X = 5 X - 1

2 X + 3 = 2

7 X + 23 - X = 2 X + 20​

Answer 1

Resposta:

X + 2 = 10

X = 10 - 2

X = 8

2.X = 12

X = 12/2

X = 6

4X = - 20

X = - 20/4

X = - 5

X + 5 = 15

X = 15 - 5

X = 10

X - 5 = 10

X = 10 + 5

X = 15

5X + 8 = 5 + 2X

5X - 2X = 5 - 8

3X = - 3

X = - 3/3

X = - 1

4X + 2X = 10 + 6 + X

6X - X = 16

5X = 16

X = 16/5

3X = 5X - 1

3X - 5X = - 1

- 2X = - 1 (MULTIPLICAR POR - 1)

X = 1/2

2X + 3 = 2

2X = 2 - 3

2X = - 1

X = - 1/2

7X + 23 - X = 2X + 20

7X - X - 2X = 20 - 23

4X = - 3

X = - 3/4