Odpowiedź:
a)
4/5x - (x + 4)/10 = -2 1/2
4/5x - 1/10x - 2/5x = -2 1/2
2/5x - 1/10x = -2 1/2
4/10x - 1/10x = -5/2
3/10x = -5/2 /*10/3
x = -5/2 * 10/3 = -25/3 = -8 1/3
b)
3/4x - (x + 2)/8 = -1 1/2
3/4x - 1/8x - 1/4 = -1 2/4
6/8x - 1/8x = -1 2/4 + 1/4
5/8x = -1 1/4 /*8/5
x = -5/4 * 8/5 = -2
Szczegółowe wyjaśnienie:
|*10
8x-x-4 =
8x - x - 4 = -25
7x = -25+ 4
7x = -21 |:7
x = -3
|*8
6x - x - 2 =
5x = -12 + 2
5x = -10 |:5
x = -2
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Odpowiedź:
a)
4/5x - (x + 4)/10 = -2 1/2
4/5x - 1/10x - 2/5x = -2 1/2
2/5x - 1/10x = -2 1/2
4/10x - 1/10x = -5/2
3/10x = -5/2 /*10/3
x = -5/2 * 10/3 = -25/3 = -8 1/3
b)
3/4x - (x + 2)/8 = -1 1/2
3/4x - 1/8x - 1/4 = -1 2/4
6/8x - 1/8x = -1 2/4 + 1/4
5/8x = -1 1/4 /*8/5
x = -5/4 * 8/5 = -2
Szczegółowe wyjaśnienie:
Odpowiedź:
a)
|*10
8x-x-4 =
8x - x - 4 = -25
7x = -25+ 4
7x = -21 |:7
x = -3
b)
|*8
6x - x - 2 =
5x = -12 + 2
5x = -10 |:5
x = -2
Szczegółowe wyjaśnienie: