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Sagot :

SYLVIA38

Réponse :

Bonsoir

Explications étape par étape

ex3)

A)

3x + 7 = 34

3x = 34 - 7

3x = 27

x = 27/3

x = 9

B)

2 + 4y = -6

4y = -6 - 2

4y = -8

y = -8/4

y = -2

c)

-3 -2a = 7

-2a = 7 +3

-2a = 10

a = -10/2

a = -5

d)

-3 = -3t -12

3t = -12 + 3

3t = -9

t = -9/3

t = -3

ex 20)

z - 8 + z + z + 3 = 61

3z - 5 = 61

3z = 61 + 5

3z = 66

z = 66/3

z = 22

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