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Sagot :

bonsoir,

a=

2x-x = 4+3

x = 7

b=

y+3y = -4 -4

4y = -8

y = -8/4 = -2

c=

7x+3x = 4+6

10x = 10

x= 10/10 = 1

d=

-a+3a = 18 -12

2a = 6

a = 6/2 = 3

e=

-4 -8 = 7t +t

-12 = 8t

t = -12/8 = -3/2

f=

13x-8x = 28-11

5x = 17

x = 17/5

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