Question

Cine imi rezolva exercitiul 12?? Dau funda!!

Answer 1

12.
a) (x-1)/(x+2)=3/4
4x-4=3x+6
x=10

b) (2x+1)/(4x+7)=4/10
    20x+10=16x+28
4x=18
x=18/4=9/2

c) (3x+7)/x= 2 1/3
 (3x+7)/x= 7/3
9x+21=7x
2x=-21
x=-21/2

d) (4x+8)/2x=0
4x+8=0
x=-8/4
x=-2