Odpowiedź:
a)
2/5(3 - x) = -2
6/5 - 2/5x = -2
-2/5x = -2 - 1 1/5 /*(-5/2)
x = -3 1/5 * (-5/2) = 16/5 * 5/2 = 8
b)
3/4(2 - 3x) = -6
3/2 - 9/4x = -6
-9/4x = -6 - 1 1/2 /*(-4/9)
x = -7 1/2 * (-4/9) = 15/2 * 4/9 = 10/3 = 3 1/3
c)
1/5(x - 3) = 9 - x
1/5x - 3/5 = 9 - x
1/5x + x = 9 + 3/5
1 1/5x = 9 3/5
6/5x = 48/5 /*5/6
x = 48/5 * 5/6 = 8
Szczegółowe wyjaśnienie:
