Odpowiedzi

2010-04-11T20:32:59+02:00
A) 44=½*(x+2+x+2x-4)*4
44 =(½x+1+½x+x-2) *4
44= (2x-1)*4
44= 8x - 4
48=8x
x=6

b) 42=½*12+x*6
42=6+x*6
42=6+6x
42-6=6x
36=6x
x=6
2010-04-11T20:34:56+02:00
B)1/2*(4x-2)*4=44
(2x-1)*4=44
8x-4=44
8x=44+4
8x=48 /:8
x=6

a)42=6+6x
6x+6=42
6x=42-6
6x=36 /:6
x=6
2010-04-11T20:35:22+02:00
44=1/2 * (x+2+x+2x-4)*4
44=1/2* (4x+8+4x+8x-16)
44= 2x+4+2x+4x-8
44=8x
5.5=x
________________________
42 = 1/2*12+x *6
42=6 + 6x
42-6= 6x
36=6x
6=x