Question

va rog mult,dau 5 strle si coroana​

Answer 1

Răspuns:

        /=inseamna supra

a)x+3/2-1/2+2x+7/10=1

3x=1-2/2-7/10

3x=1-1-7/10

x=-7/10:3=-7/10*1/3

x=-7/30

b)11x-4/4+1-x/2=6-x

11x+x-x/2=6

12x-x/2=6

24x/2-x/2=6

23x/2=6

x=6*2/23

x=12/23

c)x-4/6-x/5+3/2=2x-1/10

x-2x-x/5=-1/10+4/6-3/2

-x-x/5=-3/30+20/30-45/30

-5x/5-x/5=-28/30

-6x/5=-24/15

x=24*5/12*6=120/72

x=20/12

x=5/3

d)1-x/3+1+3x/4=2x-1  nmc=12

12-4x+12+9x=24x-12

5x-24x=-12-24

-19x=-36

x=36/19      x=1,894

e)7x-12/5+19-6x/7=x/2+x-1/5  

7x-6x/7-x/2+x=-1/5+12/5+19

98x/14-12x/14-7x/14+14x/14=11/5+19

93x/14=11/5+95/5

93x/14=106/5

x=106*14/5*93=1484/465

x=3,191

Explicație pas cu pas:

te rog coroana