Question

Rezolvați ecuatiile in Q+ :
a) 15x-6 / 4 - 3x / 2 = 1

b) 6(3x - 2) + 5 = 17x - 2

c) 2,(3)x + 1intreg si 1/6 = 0, (6)x + 2intregi si 1/3





REPEDE VA ROG !!!

Answer 1

a) 15x-6/4 - 3x/2=1 aplifici a doua fractie cu 2
(15x-6-6x)4=1
9x-6=4
9x=10⇒x=10/9

b)
6(3x - 2) + 5 = 17x - 2
18x-18+5=17x-2
18x-17x=-2+18-5
1x=11

c)
2,(3)x + 1intreg si 1/6 = 0, (6)x + 2intregi si 1/3
21x/9+7/6=2x/3+7/3
21x/9-2x/3=7/3-7/6
(7x-2x)/3=(14-7)/6
5x/3=7/6
5x=(3*7)/6
5x=21/6
x=21/6*1/5
x=21/30   se spimplifica cu 3
x=7/10