Răspuns :
Răspuns:
2x+1=2001
2x=2001-1=2000
X=2000:2
X=1000
10+5x=200
5x=200-10=190
X=190:5
X=38
2x+7=201
2x=201-7=194
X=194:2
X=97
120-5x=30
5x=30+120=150
X=150:5
X=30
14x-28=140
14x=140+28=168
X=168:14
X=12
3x-9=18
3x=18+9=27
X=27:3
X=9
120+5x=2000
5x=2000-120=1880
X=1880:5
X=376
X+5=5
X=5-5
X=0
COROANA TE ROG?
a) 2x+1=2001
2x=2001-1
2x=2000
x=2000:2
x=1000
b)10+5x=200
5x=200-10
5x=190
x=190:5
x=38
c)2x+7=201
2x=201-7
2x=194
x=194:2
x=97
d)120-5x=30
5x=120-30
5x=90
x=90:5
x=18
e)14x-28=140
14x=140+28
14x=168
x=168:14
x=12
f)3x-9=18
3x=9+18
3x=27
x=27:3
x=9
g)120+5x=2000
5x=2000-120
5x=1820
x=1820:5
x=364
h)x+5=5
x=5-5
x=0