Rozwiąż równania:
a) 7x - 6 = -6x + 7
b) 1/3 x + 2 = x
c) -7(2x + 1) = 4
d) 8 = 6(x - 1) - 4x
e)2(1 - x) = 6(2x - 2)
f)
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a) 7x - 6 = -6x + 7
7x+6x=7+6
13x=13 /:13
x=1
b) 1/3 x + 2 = x
1/3x - x= -2
- 2/3x=-2/: 2/3
x=2/5
c) -7(2x + 1) = 4
-14x=4+7
-14 x=11/:14
x= - 11/14
d) 8 = 6(x - 1) - 4x
8= 6x-6-4x
8+6=2x
8=2x /:2
x=4
e)2(1 - x) = 6(2x - 2)
2-2x=12x -12
-2x-12x=-12-2
-14x=-14/: - 14
x=1
f)
5-2x/2=1/2
-2x/2= 1/2-5
-x=- 4 i 1/2
a) 7x - 6 = - 6x + 7
7 x +6x = 7 + 6
13 x = 13 /:13
x = 1
b) 1/3x + 2 = x
1/3x - x = - 2
- 2/3 x = -2 /: (-2/3)
x = 3
c) -7(2x+1) = 4
-14x -7 = 4
- 14 x = 4 + 7
- 14x = 11 /:(-14)
x = -11/14
d) 8 = 6(x-1) - 4x
8 = 6x - 6 -4x
- 6x + 4x = -6 - 8
- 2x = - 14 /:(-2)
x = 7
e) 2( 1 - x) = 6(2x - 2)
2 - 2x = 12 x - 12
- 2x - 12x = -12 -2
- 14x = -14 /: (-14)
x = 1
f) 3 - x x + 2 1
____ + _____ = ___ /*2
2 2 2
3 - x + x +2 = 1
-x + x = 1 -3 - 2
0 = -4