Question

rezolvati in multimea numerelor intregi ecuatiile :
x+8=-2
x+10=-5
x-3=-7
x-9=-6
x-7=11
8=-3+x
9=x+23
2x=-16
9x=-36
-6x=48
x:(-4)=-12
ajutorrrrrrrrrrrrrrrr

Answer 1

Am numerotat ecuatiile. Am rezolvat cu trecere unui termen dintr-o parte in cealalta cu semn schimbat!
*=inmultire
<=> = este echivalent cu
| = cu proprietatea (cand vrei sa inmultesti ,sa imparti ceva )
:=impartire

1. x+8=-2
x=-2-8
x=-10

2. x+10=-5
x=-5-10
x= -15

3. x-3=-7
    x= -7+3
x=-4

4. x-9=-6
x=-6+9
x=+3

5.  x-7=-11
x=-11+7
x=-4

6. 8=-3+x
8+3=x
11=x <=> x=11

7. 9=x+23
9-23=x
-14=x <=> x=-14

8. -6x=48   | : 6
-x=8           | *(-1)
x=-8

9. x:(-4)=-12
x= -12 * (-4)
x=28