Răspunsuri

2014-06-20T17:54:24+03:00
B) 2x+1+2x-2x-1=5+4    297=3la 5 + 3 la 4
2x=9 x= 9/2

c) x-2+x-3+x-4=9-6      448= 2 la 9 - 2 la 6
3x-9=3 => 3x=12 => x= 4

d) x+2+x+1+x+x-1+x-2+x-3 =6+5+4+3+2+1 => 6x-3=21 => 6x=24 => x=4

e) x-1+x-2+x-3= 4+3+2 =>   775= 5 la 4+ 5 la 3 + 5 la 2
3x-6=9 => 3x=15 => x=5


a) x+1 +x=4+3 => 2x+1 =7 => 2x= 6 => x =3
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