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Real111
a fost răspuns

Rezolvati in Z ecuatiile:
1.
a)x+7=-2
b)x-5=-7
c)-5+x=3
d)8-x=10
e)-5-x=-5
f)x+11=10

2.
a)3x-1=-7
b)2x+11=-5
c)-7x+3=24
d)-5x+11=8
e)8x+5=-27
f)4x+3=-7

Va rog!!!mult!!



Răspuns :

Abc112
[tex]1)a)x + 7 = - 2[/tex]

[tex]x = - 2 - 7[/tex]

[tex]x = - 9 \: \in \: \mathbb{Z}[/tex]

[tex]b)x - 5 = - 7[/tex]

[tex]x = - 7 + 5[/tex]

[tex]x = - 2 \: \in \: \mathbb{Z}[/tex]

[tex]c) - 5 + x = 3[/tex]

[tex]x = 3 + 5[/tex]

[tex]x = 8 \: \in \: \mathbb{Z}[/tex]

[tex]d)8 - x = 10[/tex]

[tex] - x = 10 - 8[/tex]

[tex] - x = 2 \: | \times ( - 1)[/tex]

[tex]x = - 2[/tex]

[tex]e) - 5 - x = - 5[/tex]

[tex] - x = - 5+ 5[/tex]

[tex] - x = 0 \: | \times ( - 1)[/tex]

[tex]x = 0 \: \in \: \mathbb{Z}[/tex]

[tex]f)x + 11 = 10[/tex]

[tex]x = 10 - 11[/tex]

[tex]x = - 1 \: \in \: \mathbb{Z}[/tex]

[tex]2)a)3x - 1 = - 7[/tex]

[tex]3x = - 7 + 1[/tex]

[tex]3x = - 6 \: | \div 3[/tex]

[tex]x = - 2 \: \in \: \mathbb{Z}[/tex]

[tex]b)2x + 11 = - 5[/tex]

[tex]2x = - 5 - 11[/tex]

[tex]2x = - 16 \: | \div 2[/tex]

[tex]x = - 8 \: \in \: \mathbb{Z}[/tex]

[tex]c) - 7x + 3 = 24[/tex]

[tex] - 7x = 24 - 3[/tex]

[tex] - 7x = 21 \: | \div ( - 7)[/tex]

[tex]x = - 3 \: \in \: \mathbb{Z}[/tex]

[tex]d) - 5x + 11 = 8[/tex]

[tex] - 5x = 8 - 11[/tex]

[tex] - 5x = - 3 \: | \times ( - 1)[/tex]

[tex]5x = 3[/tex]

[tex]x = \frac{3}{5} \: \notin \: \mathbb{Z}[/tex]

[tex]e)8x + 5 = - 27[/tex]

[tex]8x = - 27 - 5[/tex]

[tex]8x = - 32 \: | \div 8[/tex]

[tex]x = - 4 \: \in \: \mathbb{Z}[/tex]

[tex]f)4x + 3 = - 7[/tex]

[tex]4x = - 7 - 3[/tex]

[tex]4x = - 10 \: | \div 2[/tex]

[tex]2x = - 5[/tex]

[tex]x = - \frac{5}{2} \: \notin \: \mathbb{Z}[/tex]