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1-5x=7
4x-7=9x+3
7+3x=-9x-1
13x×12=-11x-2​

Răspuns :

Alexia099Raduask

1-5x=7

5x=-6=>x=-6/5

4x-7=9x+3

4x-9x=10

-5x=10

x=-2

7+3x=-9x-1

3x+9x=-8

-12x=8

-3x=2

x=-2/3

13x×12=-11x-2

156x=-11x-2

167x=-2

x=-2/167

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