2x + 9y = -9
-3x + 3y = 8
2x + 3 * 3y = -9
3y = 3x + 8
2x + 3 * (3x + 8) = -9
2x + 9x +24 = -9
11x = -9 - 24
11x = - 33
x = - 3
3y = 3 * (-3) + 8
x = -3
3y = -9 + 8
3y = - 1
y = -1/3
Zad.7
f)
2x+9y=-9
-3x+3y=8
2x=-9y-9
x=-4,5y-4,5
-3(-4,5y-4,5)+3y=8
13,5y+13,5+3y=8
16,5y+13,5=8
16,5y=8-13,5
16,5y=-5,5
y=-¹/₃
x=-4,5·(-¹/₃)-4,5
x=1,5-4,5
{x=-3
{y=-¹/₃
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2x + 9y = -9
-3x + 3y = 8
2x + 3 * 3y = -9
3y = 3x + 8
2x + 3 * (3x + 8) = -9
3y = 3x + 8
2x + 9x +24 = -9
3y = 3x + 8
11x = -9 - 24
3y = 3x + 8
11x = - 33
3y = 3x + 8
x = - 3
3y = 3 * (-3) + 8
x = -3
3y = -9 + 8
x = -3
3y = - 1
x = -3
y = -1/3
Zad.7
f)
2x+9y=-9
-3x+3y=8
2x=-9y-9
-3x+3y=8
x=-4,5y-4,5
-3x+3y=8
x=-4,5y-4,5
-3(-4,5y-4,5)+3y=8
x=-4,5y-4,5
13,5y+13,5+3y=8
x=-4,5y-4,5
16,5y+13,5=8
x=-4,5y-4,5
16,5y=8-13,5
x=-4,5y-4,5
16,5y=-5,5
x=-4,5y-4,5
y=-¹/₃
x=-4,5·(-¹/₃)-4,5
y=-¹/₃
x=1,5-4,5
y=-¹/₃
{x=-3
{y=-¹/₃