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Exercice 3: Résoudre les équations
a) 10-2x = 5x + 3
b) 2(b-4)= 11 - b
c) -11m + 3 = -4(m + 2)
Aide moi !!svp

Sagot :

INEQUATION

Bonsoir,

Résoudre:

a) 10-2x = 5x + 3

-2x-5x= 3-10

-7x= -7

x= -7/-7

x= 1

b) 2(b-4)= 11 - b

2b-8+b= 11

3b= 11+8

b= 19/3

c) -11m + 3 = -4(m + 2)

-11m = -4m-8-3

-11m+4m= -11

- 7m= -11

m= 11/7

TEAMCE

Bonsoir,

Résoudre les équations :

a.

10 - 2x = 5x + 3

10 - 2x + 2x = 5x + 3 + 2x

10 =7x + 3

10 - 2 = 7x + 3 - 3

7 = 7x

7x = 7

x = 7/7 = 1 ✅

b.

2(b - 4) = 11 - b

2b - 8 = 11 - b

2b - 8 + 8 = 11 - b + 8

2b = 19 - b

2b + b = 19 - b + b

3b = 19

b = 19/3 ✅

c.

-11m + 3 = -4(m + 2)

-11m + 3 = -4m - 8

-11m + 3 + 4m = -4m - 8 + 4x

-7m + 3 = -8

-7m + 3 - 3 = -8 - 3

-7m = -11

7m = 11

m = 11/7 ✅

Bonne soirée