Odpowiedź:
a) 3 ( 2x-7) - ( 7x-13) = - 10
6x -21 -7x + 13= - 10
6x-7x = - 10 -13 + 21
-x= -2 /*(-1)
x= 2
b) -2 ( -27 - 3x) = - 3 ( 2x-10)
54 +6x = -6x+30
6x + 6x= 30 -54
12 x = 24 /:12
c) 6-2 ( 2x-1/2 )= 4x -2 ( 3/4 -3x)
6 -4x +1 = 4x -6/4 +6x
-4x -4x -6x = - 6/4 -6-1
-14x= -1 i 2/4 -6-1
-14 x= -8 i 1/2 /: (- 14 )
x= 17/2 *1/14= 17/28
x= 17/28
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Odpowiedź:
a) 3 ( 2x-7) - ( 7x-13) = - 10
6x -21 -7x + 13= - 10
6x-7x = - 10 -13 + 21
-x= -2 /*(-1)
x= 2
b) -2 ( -27 - 3x) = - 3 ( 2x-10)
54 +6x = -6x+30
6x + 6x= 30 -54
12 x = 24 /:12
x= 2
c) 6-2 ( 2x-1/2 )= 4x -2 ( 3/4 -3x)
6 -4x +1 = 4x -6/4 +6x
-4x -4x -6x = - 6/4 -6-1
-14x= -1 i 2/4 -6-1
-14 x= -8 i 1/2 /: (- 14 )
x= 17/2 *1/14= 17/28
x= 17/28
Szczegółowe wyjaśnienie: