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Sagot :

MAUDVI

Réponse:

7a) -2x + 7 = -x + 9

-2x + x = 9 - 7

- x = 2

x = -2

8a) 7a - 8 = 3a + 7

7a - 3a = 7 + 8

4a = 15

4a/ 4 = 15/ 4

a = 15/4

9c) 2b - 1 = -13b + 5

2b + 13b = 5 + 1

15b = 6

15b/15 = 6/15

b = 6/15

voilà (✿^‿^)
7a : 7x+17=-x+9
7x+x=9-17
8x= -8
X=-8/8= -1

8a : 7a-8=3a+7
7a-3a = 7+8
4a = 15
a = 15/4

9c : 2b-1 = 13b+5
2b-13b=5+1
-11b = 6
b = 6/-11

VOILÀ J’ESPÈRE QUE SA T’AIDERA

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