Odpowiedź:
a)
1/2x - 4 = x - 6
1/2x - x = -6 + 4
-1/2x = -2 /*(-2)
x = 4
b)
x - 5 = 1/3x + 1
x - 1/3x = 1 + 5
2/3x = 6 /*3/2
x = 6 * 3/2 = 9
c)
x/4 - 1/4 = 2
1/4x = 2 + 1/4 /*4
x= 2 1/4 * 4 = 9/4 * 4 = 9
d)
x/5 - 3 = x + 1/5
1/5x - x = 1/5 + 3
-4/5x = 3 1/5 /*(-5/4)
x = 3 1/5 * (-5/4) = -16/5 * 5/4 = -4
e)
5/6(x - 1) = 4
5/6x - 5/6 = 4
5/6x = 4 + 5/6 /*6/5
x = 4 5/6 * 6/5 = 29/6 * 6/5 = 29/5 = 5 4/5
f)
-1/2(-x - 6) = -x
1/2x + 3 = -x
1/2x + x = -3
1 1/2x = -3
3/2x = -3 /*2/3
x = -3 * 2/3 = -2
Szczegółowe wyjaśnienie:
