Mery4567ask
a fost răspuns

rezolvati ecuatiile urmatoare,unde x este numar rational:
a) 2x + 3=x-5
b)5x-6=7+2x
c)8x+2x+11=20-x
d)4x + 1= 6x-3
e)2(x-1)+1=x+8
f)5x-(x-1)=9-4x

va rog rapid!
dau coroana​

Răspuns :

Slavitescudoraask

a) 2x-x = -5-3

x = -8

b) 5x-2x = 7+6

3x = 13

x = 13/3

c) 10x+11 = 20-x

10x+x = 20-11

11x = 9

x = 9/11

d) 4x-6x = -3-1

-2x = -4

x = 2

e) 2x-2+1 = x+8

2x-x = 8+1

x = 9

f) 5x-x+1 = 9-4x

4x+4x = 9-1

8x = 10

x = 10/8 = 5/4

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