Odpowiedź:
a)
4a - 5 + (-3a + 7) = 4a - 5 - 3a + 7 = a + 2
b)
(7x - 3) - (5x + 1) = 7x - 3 - 5x - 1 = 2x - 4
c)
3(a + 2b) - (b - 2a) + 9(-3a - 4b) = 3a + 6b - b + 2a - 27a - 36b = -22a - 31b
f)
(8 - 12x)/4 - (9 - 12x)/3 = 2 - 3x - 3 + 4x = x - 1
Szczegółowe wyjaśnienie:
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Odpowiedź:
a)
4a - 5 + (-3a + 7) = 4a - 5 - 3a + 7 = a + 2
b)
(7x - 3) - (5x + 1) = 7x - 3 - 5x - 1 = 2x - 4
c)
3(a + 2b) - (b - 2a) + 9(-3a - 4b) = 3a + 6b - b + 2a - 27a - 36b = -22a - 31b
f)
(8 - 12x)/4 - (9 - 12x)/3 = 2 - 3x - 3 + 4x = x - 1
Szczegółowe wyjaśnienie: