4x/7 +2 1/2= x-1 3/14 2 1/2= (2*2+1)/2=5/2 1 3/14 = (1*14+3)=17/14
8x+14 *5/2 = 14x -17
14x-8x=70/2+17
6x=52 x =52/6=26/3 = 8 2/3
b.) (x-1/4) : (2 3/4-1 1/4)-2 1/2
(x-1/4) : (11/4-5/4)-5/2
(x-1/4) ; (6/4) -5/2
(x-1/4) : 3/2 - 5/2 1/4 : 3/2 = 1/4 * 2/3 = 1/6
2x/3 -1/6 -5/2
4x -1 -15
4x-16 la pct b nu aveai egalitatea
c.) 2/7x(4+3x)=1/6-1 5/6 ori x
8x/7+6x/7 = 1/6 -11x/6
14x/7 +11x/6 = 1/6
84x+77x = 7
14x+11x=1
25x=1
x = 1/25 aci ar putea fi o greseala ptr ca 2/7x nu prea am priceput
daca e 2 x sau 2
7 7x
d.)(x-3)x 1 1/2 +1/6=2 1/6 ori x - 3 1/3 aici x dupa (x-3) inseamna inmultit sau este x ca necunoscuta , eu o sa consider ca este inmultit
3x/2 -9/2 +1/6 =13x/6-10/3
9x-27+1=13x-20
4x= -6
x=-6/4 = - 3/2 = -1 1/2
e.) x ori (2 3/7 +1 1/2)- 3= 2 5/7 ori x -11/14
x(17/7+3/2)-3= 19x/7 -11/14
x(34/14+21/14)-3= 19x/7 -11/14
55x/14-3 = 38x/14-11/14
17 x/14 = 3-11/14 = 42/14-11/14 = 31/14
17x=31
x=31/17
f.) 2/5 ori x- 1 2/3 = - 2 1/3- 1 1/5 ori x
2x/5 -5/3 = - 7/3 - 6x/5
6x-25=-35-18x
24x= -10
x=10/24 = 5/12
g.) 0,(5)ori x - 2 1/3 =- 0,(4) ori x + 1/9
0,(9) x= 1/9+ 7/3
0,(9) x = 22/3 = 7,(3)
x = 7,(3) / 0,(9) =7,(3)
