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2010-01-26T16:53:16+01:00
Trzeba pomnozyc razy 15
5(3+x)+3(2-x)=15(3-2x)
15+5x+6-3x=45-30x
2x+21=45-30x
2x+30x=45-21
32x=24
x=24/32
x=3/4
2010-01-26T16:54:34+01:00
(3+x)/3+ (2-x)/5= 3-2x / *15
5(3+x)+3(2-x)=15(3-2x)
15+5x+6-3x=45-30x
32x = 24 / :38
x = 24/32
x = 3/4
2010-01-26T17:41:54+01:00
(3+x) /3 + (2-x) /5 = 3-2x / *15
5(3+x) + 3(2-x) = 15(3-2x)
15 + 5x + 6 - 3x = 45 - 30x
32x = 24 /:38
x = 24 /32
x = 3/4