Odpowiedź:
Szczegółowe wyjaśnienie:
Zad 1
(1)
-13 - 7 = -20
(2)
(-3) * (-10) = 30
(3)
(-15) * 3 = -45
(4)
6 * (-4) = -24
Zad 2
-11 + 3x = 3x + (-11) = 3x - 11
12x + -13 - x = (12x - x) - 13 = 11x - 13
-3 + 5x + -11 = 5x + (-3 - 11) = 5x + (-14) = 5x - 14
-13 - 4x + 3 - 15x = (-4x - 15x) + (-13 + 3) = -19x + (-10) = -19x - 10
Zad 3
2 * (7 + 11x) = 14 + 22x = 22x + 14
2 * (-12 + 2x) = -24 + 4x = 4x - 24
-2 * (-2 - x) = 4 + 2x = 2x + 4
-3 * (3 - 6x) = -9 + 18x = 18x - 9
Zad 4
Dla x = 2 mamy :
8 + 11 * 2 = 8 + 22 = 30
Dla x = -2 mamy :
-12 + 3 * (-2) = -12 - 6 = -18
Zad 5
x = 3y
x + 3 = 3y + 3
x = -4y
-2x - 2 = -2 * (-4y) - 2 = 8y - 2
x = y + 1
6x - 12 = 6 * (y + 1) - 12 = 6y + 6 - 12 = 6y - 6
x = y - 1
-2x - 23 = -2 * (y - 1) - 23 = -2y + 2 - 23 = -2y - 21
(5)
x = -2y + 7
-x + 7 - 4y = -2y + 7 + 7 - 4y = -6y + 14
(6) NIELOGICZNE
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Odpowiedź:
Szczegółowe wyjaśnienie:
Zad 1
(1)
-13 - 7 = -20
(2)
(-3) * (-10) = 30
(3)
(-15) * 3 = -45
(4)
6 * (-4) = -24
Zad 2
(1)
-11 + 3x = 3x + (-11) = 3x - 11
(2)
12x + -13 - x = (12x - x) - 13 = 11x - 13
(3)
-3 + 5x + -11 = 5x + (-3 - 11) = 5x + (-14) = 5x - 14
(4)
-13 - 4x + 3 - 15x = (-4x - 15x) + (-13 + 3) = -19x + (-10) = -19x - 10
Zad 3
(1)
2 * (7 + 11x) = 14 + 22x = 22x + 14
(2)
2 * (-12 + 2x) = -24 + 4x = 4x - 24
(3)
-2 * (-2 - x) = 4 + 2x = 2x + 4
(4)
-3 * (3 - 6x) = -9 + 18x = 18x - 9
Zad 4
(1)
Dla x = 2 mamy :
8 + 11 * 2 = 8 + 22 = 30
(2)
Dla x = -2 mamy :
-12 + 3 * (-2) = -12 - 6 = -18
Zad 5
(1)
x = 3y
x + 3 = 3y + 3
(2)
x = -4y
-2x - 2 = -2 * (-4y) - 2 = 8y - 2
(3)
x = y + 1
6x - 12 = 6 * (y + 1) - 12 = 6y + 6 - 12 = 6y - 6
(4)
x = y - 1
-2x - 23 = -2 * (y - 1) - 23 = -2y + 2 - 23 = -2y - 21
(5)
x = -2y + 7
-x + 7 - 4y = -2y + 7 + 7 - 4y = -6y + 14
(6) NIELOGICZNE