Odpowiedzi

Najlepsza Odpowiedź!
2010-03-25T17:28:12+01:00
A) 0=-8(x+3)+4(2x-6)
0=-8x-24+8x-24
8x-8x=-24-24
0=-48

b) 3=-3(5y+2)-6(3y-7)
3=-15y-6-18y+42
15y+18y=42-6-3
33y = 33 / :33
y=1

c) 2(7x-3)=5-4(6-4x)
14x-6=5-24+16x
14x-16x=5-24+6
-2x=-13 / :(-2)
x = 6½

d) 2(9y-1)-3(2y+1)+1=5(4y+3)
18y-2-6y-3+1=20y+15
18y-6y-20y = 15+2+3-1
-8y = 19 / :(-8)
y = -2 ³/₈

e)-3-5(3x-2)=-8
-3-15x+10=-8
-15x=-8-10+3
-15y= -15 / :(-15)
y= 1
1 5 1