Bonjour pouvez vous m aider merci 1. 5 x=3 x+3 2. 12a+4=8 a 3. 4−7 y=10 y 4. 6 x+1+x=−4−x 5. 2+3 p=7−2 p−p 6. b/2+1,5=9²−4 b Effectuer le calcul suivant. Écris

Hi!!

Calculons :

1) 5x = 3x + 3

5x -3x = 3

2x = 3

[tex]x = \frac{3}{2} [/tex]

2) 12a + 4 = 8a

12a - 8a = -4

4a = -4

[tex]a= - 1[/tex]

3) 4 - 7y = 10y

-7y - 10y = -4

- 17y = -4

[tex]y = \frac{4}{17} [/tex]

4) 6x + 1 + x = -4 -x

6x +x +x = -4 -1

8x = -5

[tex]x = \frac{ - 5}{8} [/tex]

5) 2 + 3p = 7 -2p -p

3p +2p +p = 7-2

6p = 5

[tex]p = \frac{5}{6} [/tex]

6) b/2 + 3/2 = 9² - 4b

b/2 + 4b = 9² - 3/2

(b + 2(4b)) /2= 81 - 3/2

(b + 8b)/2 = -243/2

9b/2 = -243/2

9b = 2(-243/2)

9b = -243

b = -243/9

b= -27

[tex]b = 17.67[/tex]

7) p = 9 + 1 × (0,1×10+9) ÷ (-5)

p= 9 + 1 × (10)÷ (-5)

p= 9 + 1 × (-2)

p= 9 - 2

[tex]p= 7[/tex]