Odpowiedź:
a) x - (2x - 1) - 2x = 2(3x - 4)
x - 2x + 1 - 2x = 6x - 8
-3x + 1 = 6x - 8
-3x - 6x = -8 - 1
-9x = -9
x = 1
b) 3(x - 2) - (x - 3) = -(5x - 4)
3x - 6 - x + 3 = -5x + 4
2x - 3 = -5x + 4
2x + 5x = 4 + 3
7x = 7
c) -(5x - 3) = 2(4 - x) - 3x
-5x + 3 = 8 - 2x - 3x
-5x + 3 = 8 - 5x
-5x + 5x = 8 - 3
0 = 5
d) -2(5x - 7) - 3x = 2(x - 8)
-10x + 14 - 3x = 2x - 16
-13x - 2x = -16 - 14
-15x = -30
x = 2
e) 2x + (-3x + 4) = -4(3x - 1)
2x - 3x + 4 = -12x + 4
2x - 3x = -12x
-x = -12x
-x + 12x = 0
11x = 0
x = 0
f) (5 - x) - (x + 1) - 9 = -(2x + 5)
5 - x - x - 1 - 9 = -2x - 5
-5 - 2x = -2x - 5
-2x + 2x = -5 + 5
0 = 0
g) -(5x + 4) + (x - 1) - (1 - x) = 0
-5x - 4 + x - 1 - 1 + x = 0
-3x - 6 = 0
-3x = 6
x = -2
h) 4x - 8 - (x + 3) + 2x = -(2x - 3)
4x - 8 - x - 3 + 2x = -2x + 3
5x - 11 = -2x = 3
5x + 2x = 3 + 11
7x = 14
Szczegółowe wyjaśnienie:
Nie jestem pewna w tych dwóch przykładach... liczę na naj...
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Odpowiedź:
a) x - (2x - 1) - 2x = 2(3x - 4)
x - 2x + 1 - 2x = 6x - 8
-3x + 1 = 6x - 8
-3x - 6x = -8 - 1
-9x = -9
x = 1
b) 3(x - 2) - (x - 3) = -(5x - 4)
3x - 6 - x + 3 = -5x + 4
2x - 3 = -5x + 4
2x + 5x = 4 + 3
7x = 7
x = 1
c) -(5x - 3) = 2(4 - x) - 3x
-5x + 3 = 8 - 2x - 3x
-5x + 3 = 8 - 5x
-5x + 5x = 8 - 3
0 = 5
d) -2(5x - 7) - 3x = 2(x - 8)
-10x + 14 - 3x = 2x - 16
-13x - 2x = -16 - 14
-15x = -30
x = 2
e) 2x + (-3x + 4) = -4(3x - 1)
2x - 3x + 4 = -12x + 4
2x - 3x = -12x
-x = -12x
-x + 12x = 0
11x = 0
x = 0
f) (5 - x) - (x + 1) - 9 = -(2x + 5)
5 - x - x - 1 - 9 = -2x - 5
-5 - 2x = -2x - 5
-2x + 2x = -5 + 5
0 = 0
g) -(5x + 4) + (x - 1) - (1 - x) = 0
-5x - 4 + x - 1 - 1 + x = 0
-3x - 6 = 0
-3x = 6
x = -2
h) 4x - 8 - (x + 3) + 2x = -(2x - 3)
4x - 8 - x - 3 + 2x = -2x + 3
5x - 11 = -2x = 3
5x + 2x = 3 + 11
7x = 14
x = 2
Szczegółowe wyjaśnienie:
Nie jestem pewna w tych dwóch przykładach... liczę na naj...