Question

Va rog !Spuneti-mi si mie cum se rezolva o astfel de ecuatii:
a)2(x+2)=3x-6
b)9-2x=31-7x
c)3(x+1)=11-x
d)4x+2=3(x+1)
e)5+x-2=x+3
f)2(x+1)=16-x
Va rog dau coronita !!!

Answer 1

a) 2(x+2)=3x-6=>
=>2x+4=3x-6=>
=>2x-3x=-6-4=>
=>-x=-10=>
=>x=10
b)9-2x=31-7x=>
=>9-2x+7x=31-8=>
=>5x=22=>
=>x=22/5
c)3(x+1)=11-x=>
=>3x+x=11-3=>
=>4x=8=>
=>x=2
d)4x+2=3(x+1)=>
=>4x+2=3x+3=>4x-3x=3-2=>
=>x=1
e)5+x-2=x+3=>
=>5-2=3=>
=>3=3=>
=>x apartinde de R
f)2(x+1)=16-x=>
=>2x+2=16-x=>
=>2x+x=16-2=>
=>3x=14=>
=>x=14/3