Odpowiedź:
e)
(3x - 5)/2 - (5x - 1)/10 = 0
3/2x - 5/2 - 1/2x + 1/10 = 0
x = 5/2 - 1/10 = 2 5/10 - 1/10 = 2 4/10 = 2 2/5
f)
x/2 = 2/5(4 - x) - 4
1/2x = 8/5 - 2/5x - 4
5/10x + 4/10x = 1 3/5 - 4
9/10x = -2 2/5 /*10/9
x = -12/5 * 10/9 = -4 * 2/3 = -8/3 = -2 2/3
g)
(2x - 1)/5 - (x - 2)/2 = 0,7x
2/5x - 1/5 - 1/2x + 1 = 0,7x
0,4x - 0,5x - 0,7x = 2/10 + 5/10
-0,8x = 0,2 + 0,5 /:(-0,8)
x = 0,7 : (-0,8) = -0,875
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Odpowiedź:
e)
(3x - 5)/2 - (5x - 1)/10 = 0
3/2x - 5/2 - 1/2x + 1/10 = 0
x = 5/2 - 1/10 = 2 5/10 - 1/10 = 2 4/10 = 2 2/5
f)
x/2 = 2/5(4 - x) - 4
1/2x = 8/5 - 2/5x - 4
5/10x + 4/10x = 1 3/5 - 4
9/10x = -2 2/5 /*10/9
x = -12/5 * 10/9 = -4 * 2/3 = -8/3 = -2 2/3
g)
(2x - 1)/5 - (x - 2)/2 = 0,7x
2/5x - 1/5 - 1/2x + 1 = 0,7x
0,4x - 0,5x - 0,7x = 2/10 + 5/10
-0,8x = 0,2 + 0,5 /:(-0,8)
x = 0,7 : (-0,8) = -0,875
Szczegółowe wyjaśnienie: