Question

Rezolva in mulțimea Z ecuațiile:​

Answer 1

Atat am stiut si eu

Answer 2

Răspuns:

a)17+x=2

x=2-17

x=-15

b)x+39=0

x=-39

c)-x-7=0

-x=7

x=-7

d)-x+12=-1

-x=-1-12

-x=-13

x=13

e)x-43=11

x=11+43

x=54

f)12-x=5

-x=5-12

-x=-7

x=7

g)-13+x=-1

×=-1+13

x=12

h)-x+2+3x=2

-x+3x=2-2

2×=0

×=0

i)6+5×=2×+18

5×-2×=18-6

3×=12

×=4

j)-4-3×=×+8

-3×-×=8+4

-4×=12

×=3

k)-(-×-3)+2=10

×+3+2=10

×+5=10

×=10-5

×=5

l)3-(4-x)=1

3-4+x=1

-1+×=1

×=1+1

×=2