MATHIASGUAIS72000
Answered

Bonjoir je n arrive pas à résoudre ces equations

Exercice 01 : Résous les équations suivantes (6 p
a. 5x + 5 = 45
b. 4- 7x = 25
C. 3x + 7x=20
D. 5x/3=2
E.6x+12=3
F.4x+2=3x+4
g. 6x - 8 =5-2x
h.7_8x = 3 + 2x
I. 5(x+3)=3x+7
j. 2(x-7)= 3(x + 1)
k. 10(x + 4) + 7(2x - 3) = 7
1. 7(6 - 2x), 3(4x + 1) = 0
Merci​

Sagot :

MAUDMARINE

Bonjour,

a. 5x + 5 = 45

5x = 45 - 5

5x = 40

x = 40/5

x = 8

b. 4 - 7x = 25

- 7x = 25 - 4

- 7x = 21

x = - 21/7

x = - 3

c. 3x + 7x = 20

10x = 20

x = 20/10

x = 2

d. 5x/3 = 2

5x = 6

x = 6/5

e. 6x + 12 = 3

6x = 3 - 12

6x = - 9

x = - 9/6

x = - 3/2

f. 4x + 12 = 3x + 4

4x - 3x = 4 - 12

x = - 8

g. 6x - 8 = 5 - 2x

6x + 2x = 5 + 8

8x = 13

x = 13/8

h. 7 - 8x = 3 + 2x

- 8x - 2x = 3 - 7

- 10x = - 4

x = 4/10

x = 2/5

i. 5 (x + 3) = 3x + 7

5x + 15 = 3x + 7

5x - 3x = 7 - 15

2x = - 8

x = - 8/2

x = - 4

k. 10 (x + 4) + 7 (2x - 3) = 7

10x + 40 + 14x - 21 = 7

10x + 14x = 7 - 40 + 21

24x = - 12

x = 12/24

x = 1/2

1. 7 (6 - 2x) - 3 (4x + 1) = 0

42 - 14x - 12x - 3 = 0

- 14x - 12x = 3 - 42

- 26x = - 39

x = 39/26