Question

1 ex: rezolvati
1)in multimea N ecuatia: 2)in multimea Z ecuatia:

a) 3x-4=6-x; b) 1-8x=x-5; c)3+y=-2y-60.
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2 ex: rezolvatiin multimea Z ecuatia:

a) 7x-12=|(-4)²|; b) 5/z=|-5(cu exponentul 0)|; c) y/(-12)=|(-6)³|.

Answer 1

3x-4=6-x
3x+x=6+4
4x=10
x=10/4
x=2.5

1-8x=x-5
-8x-x=-5-1
-9x=-6
x=-6/-9
x=2/3

3+y=-2y-60
y+2y=-60-3
3y=-63
y=-63/3
y=-21

Punctul 2
7x-12=|(-4)2|
|(-4)2|=|16|
|16|=16 si -16

7x-12=-16
7x=-16+12
7x=-4
x=-4/7

7x-12=16
7x=16+12
7x=28
x=28/7
x=4

5/z=-5cu exponentul 0
-5cu exponentul0=-1
5/z=-1
z=5/-1
z=-5

y/-12=|(-6)3|
|(-6)3|=|-216|=216 si -216
y/-12=216
y=216*-12
y=-2592

y/-12=-216
y=-216*(-12)
y=2592

Acesta nustiu precis daca este corecta