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2010-03-17T19:25:34+01:00
4x-3x= 5+ 3
x=8

5x+3x=7-2
8x=5
x= 5/8 = 1 i 3/8

-7x+14=3x-1
-10x=-15
x= -15/-10 = 1.5

4x-4=6+6x
-2x=10
x=-5
2010-03-17T19:28:16+01:00
A)
4x - 3 = 3x + 5
4x - 3x = 5 + 3
x = 8

b)
5x + 2 = 7 -3x
5x + 3x = 7 -2
8x = 5
x = 5/8

c)
-7(x -2) = 3x - 1
-7x +14 = 3x - 1
-7x - 3x = -1 - 14
-10x = -15
x = 1,5

d)
4(x - 1) = 6 ( 1+ x)
4x - 4 = 6 + 6x
4x - 6x = 6 + 4
-2x = 10
x = - 5