Question

2x+2 divide 30  heiiiiiiiii

Answer 1

2x+2|30=> 2x+2 apartine divizorilor lui 30 =>
=> 2x+2 apartine {1,2,3,5,6,10,15,30} /-2
2x apartine { -1, 0, 1, 3, 4, 8, 13, 28} /:2
x apartine {-1/2, 0 , 1/1 , 3/2 , 2, 4, 13/2 , 14}
si depinde de multimea in care iti cere solutia 

Answer 2

Divizorii naturali ai lui 30 sunt {1,2,3,5,6,10,15,30}
Pentru ca 2x-3 | 30 , 2x-2 ∈ {1,2,3,5,6,10,15,30}

2x-2 ∈ {1,2,3,5,6,10,15,30} | (-2)<=> 2x ∈ { -1, 0, 1, 3, 4, 8, 13, 28} |: (2) <=>x∈{-$\frac{1}{2}$, 0 , $\frac{1}{2}$ , $\frac{3}{2}$ , 2, 4, $\frac{13}{2}$ ,14}