zadanie 10 z załącznika
a)2x-5y=7
x=2-4/3y
2(2-4/3y)-5y=7
4-8/3y-5y=7
-5 8/3y=3 /:5 8/3
y=9/23
x=2- 4/3 (9/23)=12/23
a)
2x-5y=7 / :2
3x+4y=6
x- 5/2 = 7/2
x=7/2 + 5/2=6
3*6 + 4y=6
4y= 6-18 /:4
y= -3
y=-3
x=6
b)
(x-2/3) - (x+2/4) = 12 / *12
(x/4) + (x-1/3) = 6 / *12
4x-8-3y-6=144
3x+4y-4=72
4x-3y=158 /4
3x+4y=76
4x=158+3y
x=39.5 + 0.75
x=40.25
3*40.25 + 4y = 76
120.75 + 4y = 76
4y= -44.75 /:4
y= - 44.75/4
x= 40.25
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a)2x-5y=7
x=2-4/3y
2(2-4/3y)-5y=7
4-8/3y-5y=7
-5 8/3y=3 /:5 8/3
y=9/23
x=2- 4/3 (9/23)=12/23
a)
2x-5y=7 / :2
3x+4y=6
x- 5/2 = 7/2
x=7/2 + 5/2=6
3*6 + 4y=6
4y= 6-18 /:4
y= -3
y=-3
x=6
b)
(x-2/3) - (x+2/4) = 12 / *12
(x/4) + (x-1/3) = 6 / *12
4x-8-3y-6=144
3x+4y-4=72
4x-3y=158 /4
3x+4y=76
4x=158+3y
x=39.5 + 0.75
x=40.25
3*40.25 + 4y = 76
120.75 + 4y = 76
4y= -44.75 /:4
y= - 44.75/4
x= 40.25