Question

REZOLVATI - MI VA ROG

Answer 1

5x-1=4   
5x=4+1
5x=5
x=5:5
x=1
S={1}

2/3x+3=1
2/3x=1-3
2/3x≈0,7
x=07:2/3 (0,7)
x=1
S={1}

La a 3-a nu știu =(

|3x+1|=9
|3x|=9-1
|3x|=8
|x|=8:3
|x|≈2,7

Answer 2

a) 5x-1=4
5x=4+1
5x=5
x=5/5
x=1
S={1}
b) ⅔x+3=1
⅔x=1-3
⅔x=-2
x=-2:⅔
x=-3
S={-3}

c) 3,8-2x=7
-2x=7-3,8
-2x=3,2
x=-1,6
S={-1,6}


|3x+1|=9
3x+1=9 sau 3x+1=-9
3x=9-1 sau 3x=-9-1
3x=8 sau 3x=-10
x=8/3 sau x=-10/3

S={-10/3; 8/3}