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a) 3 - x = 2x + 1
2-3x=0
-3x=-2
x=2/3
b) 3x + 4 = x + 5
2x-1=0
2x=1
x=1/2
c) x + 2x = -6
3x+6=0
3x=-6 //:3
x=-2
d) x + 4 = 2x - 1
x-2x+1+4=0
5-x=0
-x=-5
x=5
e) 3x - 4 - 1/2x = 6
5/2x-10=0
5/2x=10
x=4
f) 1/2x + 3 = -1 1/2
x+6=-3
x=-3-6
x=-9
2.
a) x + 2 > 3x
2-2x>0
-2x>-2
x<1
b) 1/2x - 1 < x + 1
-1/2x-2<0
-1/2x<2
x>-4
c) x - (2x + 1) > -3
x-2x-1+3>0
2-x>0
-x>-2
x<2
d) 1/2(x +1) - 3 1/2 < 4
x+1-7<8
x<8-1+7
x<14
\
e) 2x + 3 < -1 + 5x
4-3x<0
-3x<-4
x>4/3
f) 4x - 5 > 1 - 2(x - 1)
2x-1+4x-5-1>0
6x-5-2-1>0
6x-8>0
6x>8
x>4/3
g) 2(2x + 2) - (3x - 1) > 2
2*2x+2-3x-2+1>0
x-2+1+4>0
x+3>0
x>-3
h) 1/2x + (2x - 4) < 1
1/2x+2x+-4-1<0
5/2x-5<0
5/2<5
x<2
a)
b)
c)
d)
e)
f)
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2.
a)
b)
c)
d)
e)
f)
g)
h)