Question

Aflati x:

a) 2x - 1 aparine D12
b) x + 3 | 2x + 15

Answer 1

D12={1;2;3;4;6;12}
2x-1=1
2x=2
x=1
2x-1=2
x=$\frac{3}{2}$
2x-1=3
2x=4
x=2
2x-1=6
2x=7
x=$\frac{7}{2}$
2x-1=12
x=$\frac{13}{2}$
b)
x+3=2x+15
x-2x=12
-x=12
x=-12