MABOUILLE93000
Answered

Bonjour à tous pouvez vous m’aider svp je ne arriv pas merci

2. 7x+9=2x-1
3. 2-3x=4x-3
4. 7x+5x-3=3x+1
5. 4x-5=3x-2x+7

Sagot :

MAUDMARINE

Bonjour

2. 7x+9=2x-1

7x - 2x = - 1 - 9

5x = - 10

x = - 10/5

x = - 2

3. 2-3x=4x-3

- 3x - 4x = - 3 - 2

- 7x = - 5

x = 5/7

4. 7x+5x-3=3x+1

7x + 5x - 3x = 1 + 3

9x = 4

= 4/9

5. 4x-5=3x-2x+7

4x - 3x + 2x = 7 + 5

3x = 12

x = 12/3

x = 4.