Odpowiedzi

2010-03-15T16:45:22+01:00
A) x= 5
b) x= 6
c) x =2
d) x= 10
e)x= -6
f)x=7
g) x= -9
h) x=24,8
i) x=-5
2 4 2
2010-03-15T16:48:28+01:00
A)
x + 5 = 10
x = 10 - 5
x = 5

b)
2x + 3 = 15
2x = 15 -3
2x = 12
x = 6

c)
5x + 13 = 23
5x = 23 - 13
5x = 10
x = 2

d)
3x + 11 = 41
3x = 41 - 11
3x = 30
x = 10

e)
-x + 2 = 8
-x = 8 - 2
-x = 6
x = -6

f)
-x + 5 = -2
-x = -2 - 5
-x = -7
x = 7

g)
-2x - 7 =11
-2x = 11 + 7
-2x = 18
-x = 9
x = -9

h)
-5x + 3 = -121
-5x = -121 - 3
-5x = -124
-x = -24,8
x = 24,8

i)
-1,5x + 2 = 9,5
-1,5x = 9,5 - 2
-1,5x = 7,5
-x = 5
x = -5
3 5 3
2010-03-15T16:51:58+01:00
A) 5+5=10 x=5
b) 2*6+3=15 x=6
c) 5*2+13=23 x=2
d) 3*10+11=41 x=10
e) -10+2=8 -x=10
f) -7+5=-2 -x=7
g) -2*-9-7=11 x=-9
h)-------------------------
i) -1,5*8,5+2=9,5 x=8,5
1 1 1