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64-46=-2x+x
18=x
b)3-x=-2x
3=-2x-x
3=-3x |*(-1)
-3=3x |/3
-1=x
c)4+3x=2+2x
4-2=2x-3x
2=-x | *(-1)
-2=x
d)x+1/4=1/2+2x
1/4-1/2=2x-x
-1/4=x
e)1 3/4-3x=-3 1/4-4x
7/4-5/4=3x-4x
2/4=-x | *(-1)
-1/2=x
64+2x=46+x /-x
64+x=46 /-64
x=-18
spr.
64+2*(-18)=46+(-18)
64+(-36)=46-18
64-36=28
28=28
L=P
b )
3 - x = -2x /+x
3 = - x /:(-1)
-3=x
spr.
3 - x = -2x
3 - (-3) = -2*(-3)
6=6
L=P
c )
4 + 3x = 2 + 2x /-2x
4 + x = 2 /-4
x=-2
spr.
4 + 3*(-2) = 2 + 2*(-2)
4 + (-6) = 2+ (-4)
4-6=2-4
-2=-2
L=P
d )
x + 1/4 = 1/2 + 2x /-x
1/4 = 1/2 + x /*4
1 = 2 + 4x /-2
-1 = 4x /:4
-1/4=x
spr.
-1/4 + 1/4 = 1/2 + 2*(-1/4)
0=1/2-1/2
0=0
L=P
e )
7/4 - 3x = -13/4 - 4x /+4x
7/4 + x = -13/4 /*4
7 + 4x = -13 /-7
4x = -20 /:4
x = -5
spr.
7/4 - 3*(-5) = -13/4 - 4*(-5)
7/4 + 15 = -13/4 + 20 /+13/4
5 + 15 = 20
20 = 20
L = P