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Sagot :

KIMIA05

Explications étape par étape:

1.

3(2x-3)+x=5

6x-9+x=5

7x=9+5

7x=14

7x\7=14\7

x=2

2.

5-2(-x+3)=-2x

5+2x-6= -2x

2x + 2x = -5 +6

4x = 1

x = 1\4 ou 0,25

FAMILYS

Bonjour,

1) 3(2x - 3) + x = 5

6x - 9 + x = 5

7x - 9 = 5

7x = 5 + 9

7x = 14

7x / 7 = 14 / 7

x = 2

2) 5 - 2(-x + 3) = -2x

5 - (-2x + 6) = -2x

5 + 2x - 6 = -2x

(-1) + 2x = -2x

(-1) = -2x - 2x

-4x = -1

-4x / -4 = -1 / -4

x = 1/4 = 0,25

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