Rozwiąż równanie:b) 1/4x - (4 + 1/2x) = -2 d) 1/3 · (-6x + 9) -4 = -5 (x + 1) Spośród danych równań wybierz równania równoważne:a) -1/2x = 4 b) -x + 3 = -5 c) 8 - x = 4 d) 2x - 3 = 5 e) 1/4x = 2 f) 4x = -32 Rozwiąż równanie:b) 27 - x = 35 c) 18 + x = -7 d) x - 16 = -9 e) 81 - x = -13 f) -19 + x = 20 g) 8x = 3 h) 3/4x = -2 i) -0,6x = 9
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b) 1/4x - (4 + 1/2x) = -2
1/4x - 4 - 1/2x = -2
1/4x - 4 - 2/4x = -2
-1/4x = 2
-x = 8
x = -8
d) 1/3 · (-6x + 9) -4 = -5 (x + 1)
-2x + 3 - 4 = -5x - 5
-2x - 1 = -5x - 5
3x = -6
x = -2
a) -1/2x = 4
-x=8
x=-8
b) -x + 3 = -5
-x = -8
x=8
c) 8 - x = 4
-x = -4
x=4
d) 2x - 3 = 5
2x = 8
x=4
e) 1/4x = 2
x=8
f) 4x = -32
x=-32:4
x=-8
b) 27 - x = 35
-x = 35 - 27
-x = 8
x= -8
c) 18 + x = -7
x = -7 - 18
x = -25
d) x - 16 =-9
x = -9 + 16
x=7
e) 81 - x = -13
-x = -13 - 81
-x = -94
x=94
f) -19 + x = 20
x= 20 + 19
x=39
g) 8x = 3
x=3/8
h) 3/4x = -2
3x= -8
x= -8/3
i) -0,6x = 9
x= 9 : (-0,6)
x=-15