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2010-04-15T16:08:35+02:00
A) x +75=57
x=-18
b) x-34=-35
x=-1
c)3x=2x+jedna siudma
x=1/7
d)3-x=2x
3=3x
x=1
e)5y=13
y=13/5
y=2 3/5
2010-04-15T16:08:57+02:00
A) x +75=57
x=-18
b) x-34=-35
x=-1
c)3x=2x+1/7
x=1/7
d)3-x=2x
3=3x
x=1
e)5y=13
y=13/5
y=2,6
2010-04-15T16:11:20+02:00

a) x + 75 = 57
x = 57 - 75
x = - 18

b) x - 34 = -35
x = -35 + 34
x = -1

c) 3x = 2x + 1/7
3x - 2x = 1/7
x = 1/7

d) 3 - x = 2x
-x - 2x = -3
-3x = -3 | : (-3)
x = 1

e) 5y = 13 | : 5
y = 13/5
y = 2 i 3/5 ( 2 i trzy piąte)