Question

rezolvati ecuatiile ; 3x - 6 = 0,12;     5-0,4x= 3,8;      x-2,4 =8;      x+3,6= 0,5;      -x + 8,2 =6 dau coroana

Answer 1

3x-6=0,12=>3*x-6((12/100))=0 =>(3x-6)-3/25=0
3x-6=3x-6/1=(3x-6)*25totul/25
3x-6=3*(x-2)
3x(x-2)*25-(3)totul/25=75x-153totul/25
75x-153=3*25x-51
3*(25x-51)/25=0
3*(25x-51)/25 *25=0*25
3*(25x-51)=0
3=0
25x-51=0
25x=51
x=51/25=2,040

5-0,4x=3,8=>5-(4/10)*x-((38/10))=0
19/5=>(5-(4/10*x))-19/5=0
2/5=>(5-2/5*x))-19/5=0
5=5/1=5*5/5
5*5-(2x)totul/5=25-2x/5
(25-2x)/5-19/5==
(25-2x)-(19)totul/5=6-2x/5
6-2x=-2*(x-3)
-2*(x-3)totul/5=0
-2*(x-3)/5*5=0*5
-2*(x-3)=0
-2=0
x-3=0
x=3

x-2,4=8=>x-(24/10)-(8)=0
12/5=>(x-12/5)-8=0
x=x/1=x*5/5
x*5-(12)totul/5-8=0
8=8/1=8*5/5
(5x-12)-(8*5)totul/5=5x-52/5
5x-52/5=0
5x-52/5*5=0*5
5x-52=0
5x=52
x=52/5=10,400

x+3,6=0,5=>x+(36/10)-((5/10))=0
1/2=>(x+30/10)-1/2=0
18/5=>(x+18/5)-1/2=0
x=x/1=x*5/5
x*5+18totul/5=5x+18/5
(5x+18)-1/2=0
(5x+18)*2-(5)totul/10=10x+31totul/10
10x+31/10=0
10x+31/10*10=0*10
10x+31=-
x=-31/10=-3,100

-x+8,2=6=>-x+(82/10)-(6)=0
41/5=>(-x+41/5)-6=0
-x=-x/5=-x*5/5
-x*5+41totul/5=1-5xtotul/5
(41-5x)/5-6=0
6=6/1=6*5/5
(41-5x)-6*5totul/5=11-5x/5
11-5x/5=0
11-5x/5*5=0*5
11-5x=0
-x+11=0
-5x=-11
x=11/5=2,200