Odpowiedzi

2009-11-19T18:41:08+01:00
X+5=4(x+5)
x+5=4x+20
-3x=15
x=-5

x+10=3(x+10)
x+10=3x+30
-2x=20
x=-10
2009-11-19T18:41:07+01:00
1)
x+5=4(x+5)
x + 5 = 4x + 20
3x = 5-20
3x = -15
x = -5
2)
x+10=3(x+10)
x + 10 = 3x + 30
2x = 10 -30
2x = -20
x = -10
2009-11-19T18:42:10+01:00
X+5=4(x+5)
x+5=4x+20
x-4x=20-5
-3x=15 I:(-3)
x=-5


x+10=3(x+10)
x+10=3x+30
x-3x=30-10
-2x=20 I:(-2)
x= -10