Odpowiedź:
a)
x + 7 = 12
x = 12 - 7
x = 5
b)
6 = 2 - x
x = 2 - 6
x = -4
c)
3x - 8 = 1
3x = 1 + 8
3x = 9 /: 3
x = 3
d)
x - 10 = 50
x = 50 + 10
x = 60
e)
2x = 1/5 /: 2
x = 1/5 • 1/2
x = 1/10
f)
1/3x = 3 /: 1/3
x = 3 • 3
x = 9
g)
5 = 2x - 1
-2x = -1 - 5
-2x = -6 /: (-2)
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Odpowiedź:
a)
x + 7 = 12
x = 12 - 7
x = 5
b)
6 = 2 - x
x = 2 - 6
x = -4
c)
3x - 8 = 1
3x = 1 + 8
3x = 9 /: 3
x = 3
d)
x - 10 = 50
x = 50 + 10
x = 60
e)
2x = 1/5 /: 2
x = 1/5 • 1/2
x = 1/10
f)
1/3x = 3 /: 1/3
x = 3 • 3
x = 9
g)
5 = 2x - 1
-2x = -1 - 5
-2x = -6 /: (-2)
x = 3