Question

Verificati daca -1supra 3 este soluite a ecuatiilor:a)3x=-1,x€Q,b)4x+1supra2=5,x€Q,c)9supra2x+2=1supra2,x€Q,d)4(3x+1)=0,x€Q

Answer 1

3x=-1
x=-1/3
b) 4x+1/2=5
8x+1=10
8x=10-1
x=9/8
C) 9/2x+2=1/2
9x+4=1
9x=1-4
x=-3/9=-1/3
d) 4(3x+1)=0
12x+4=0
12x=-4
x=-4/12
x=-1/3