Question

Buna, am o tema la mate, si sper ca ma puteti ajuta:
3,(2)= ; 4x+1= 5, X apartine R
2016 2017
(-1) + (-1) = ; 1-3x= 4, X apartine R

3x+7= -14 , X apartine R ; 3(x+1) + 2(x-4)= 7, X apartine R

Va rog din tot sufletul, ofer 50 DE PUNCTE

Answer 1

3,(2)=3 intregi si 2/9=(3x9+2)/9=29/9

4x+1=5 =>4x=4 =>x=1

(-1)+(-1)=(-2)

1-3x=4 =>-3x=3 =>x=(-1)

3x+7=-14 =>3x=-21 =>x=(-7)

3x+3+2x-8=7 =>5x-5=7 =>5x=12 =>x=12/5=2,4