Question

Rezolvați in mulțimea N ecuațiile:
a) 3(1-2x)+8=32
b) 60:(3y+2)=12
c)1-2(8x-4)=1
d)1605+4(3-x)=2011

Answer 1

a) 3(1-2x)+8=32
3-6x=32-8
6x=3-24
6x=-21
x=-21/6   nu are solutii in N

b) 60:(3y+2)=12
36y+24=60
36y=36
y=1

 c)1-2(8x-4)=1
1-16x+8=1
16x=8
x=8/16
x=1/2   nu are solutii in N

d)1605+4(3-x)=2011
1605+12-4x=2011
4x=1617-2011
4x=-394x=-394/4  nu are solutii in N