Rozwiąż równania i sprawdź:
a) x-(x-3)= 2x+3
3
b) 3(x+2)-2= 4(x-1)+5
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a)
x-(x-3)= 2x+3
x-x+3= 2x+3
x-1-1=2x+3
3x
2
3x-1=2x-+3 +1
3x=2x+4 -2x
x=4
b)
3(x+2)-2= 4(x-1)+5
3x+6-2=4x-4+5
3x+4=4x+1 -1
3x+3=4x -3x
3=x
x-3
x - -------- = 2x+3 I*3
3x - (x-3) = 3(2x+3)
3x - x + 3 = 6x + 9
2x - 6x = 9 - 3
-4x = 6 /:(-4)
x = -6/4
x = -1,5
----------
3(x + 2) - 2 = 4(x -1) + 5
3x + 6 - 2 = 4x - 4 + 5
3x + 4 = 4x + 1
3x - 4x = 1 - 4
-x = -3 /:(-1)
x = 3
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a)
x-(x-3)= 2x+3
3
x-x+3= 2x+3
3
x-1-1=2x+3
3x
2
3x-1=2x-+3 +1
3x=2x+4 -2x
x=4
b)
3(x+2)-2= 4(x-1)+5
3x+6-2=4x-4+5
3x+4=4x+1 -1
3x+3=4x -3x
3=x
a)
x-3
x - -------- = 2x+3 I*3
3
3x - (x-3) = 3(2x+3)
3x - x + 3 = 6x + 9
2x - 6x = 9 - 3
-4x = 6 /:(-4)
x = -6/4
x = -1,5
----------
b)
3(x + 2) - 2 = 4(x -1) + 5
3x + 6 - 2 = 4x - 4 + 5
3x + 4 = 4x + 1
3x - 4x = 1 - 4
-x = -3 /:(-1)
x = 3
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