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a fost răspuns

1. a. 4-x/2=5=> x=??
B. x-x/2 < sau egal 1,x €N=>X=?

2. 3x-2 (x+2)=4 (x+3) => x=??
(X+1)la puterea a 2.a =(x-1)(x+1) => x=??
4/3-x>1,x €Z=> x=??
3-2 (x+1)<0, €N => x= ??


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Răspuns :

1)x/2=1, x=2
2)x-[tex] \frac{x}{2} \leq 1 \\ \frac{x}{2} \leq 1 \\ x \leq 2[/tex]
x∈{0,1,2}
3)3x-2x-4=4x+12
x-4x=16
-3x=16
x=-16/3
4)[tex] x^{2} +2x+1= x^{2} -1 \\ 2x=-2 \\ x=-1[/tex]
x,4/3-1,x<1/3,x∈{0}U[tex]Z_{-} [/tex]
5)3-2x-2<02x>1,
x>1/2
x∈[tex] N^{*} [/tex]

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