Question

Rezolvati ecuatiile : a)6( x+5) -3x=21
b)32-7(x-5)= 3(x-1)
c)0,2x-1,2=0,14
d)0,16x-0,25=0,006

Answer 1

a) 6x+30-3x=21 
3x=-9 =>x= -3

b) 32-7x+35= 3x-3 
67-10x+3=0
x=7

c) 2x/10 - 12/10 = 14/100 
2x-12=14/10
20x-120=14
x=134/20=67/10=6,7

d)16x/100-25/100=6/1000
160x-250=6
160x=256
x=256/160=16/10=1.6