rozwiąż układ równań 6x+y=-6 4x+3y=11 i 3x+9y=12 5x+12y=2
6x+y=-6
4x+3y=11
y=-6-6x
4x+3(-6-6x)=11
y=-6-6x4x-18-18x=11
y=-6-6x-14x=29
x=-29/14
y=-6-6*(-29/14)
y=-6+174/14
y=90/14
---------------------------------------
3x+9y=12 /:3
5x+12y=2
x+3y=4
x=4-3y
5(4-3y)+12y=2
20-15y+12y=2
-3y=-18
y=6
x=4-3*6
x=-14
4x+3*(-6-6x)=11
4x-18-18x=11
4x-18x=11+18
-14x=29 /:(-14)
x=-2 1/14
y=-6-6*(-2 1/14)
y= 6 6/14=90/14
_____________________________
3x+9y=12/*5
5x+12y=2 /*(-3)
15x+45y=60
+ -15x-36y=-6
------------------------
9y=54/:9
3x+9y=12
3x+9*6=12
3x=12-54
3x=-42/:3
y=6Proszę :)
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6x+y=-6
4x+3y=11
y=-6-6x
4x+3(-6-6x)=11
y=-6-6x
4x-18-18x=11
y=-6-6x
-14x=29
y=-6-6x
x=-29/14
y=-6-6*(-29/14)
x=-29/14
y=-6+174/14
x=-29/14
y=90/14
x=-29/14
---------------------------------------
3x+9y=12 /:3
5x+12y=2
x+3y=4
5x+12y=2
x=4-3y
5(4-3y)+12y=2
x=4-3y
20-15y+12y=2
x=4-3y
-3y=-18
x=4-3y
y=6
x=4-3*6
y=6
x=-14
y=6
6x+y=-6
4x+3y=11
y=-6-6x
4x+3*(-6-6x)=11
y=-6-6x
4x-18-18x=11
y=-6-6x
4x-18x=11+18
y=-6-6x
-14x=29 /:(-14)
y=-6-6x
x=-2 1/14
x=-2 1/14
y=-6-6*(-2 1/14)
x=-2 1/14
y=-6+174/14
x=-2 1/14
y= 6 6/14=90/14
_____________________________
3x+9y=12/*5
5x+12y=2 /*(-3)
15x+45y=60
+ -15x-36y=-6
------------------------
9y=54/:9
y=6
3x+9y=12
y=6
3x+9*6=12
y=6
3x=12-54
y=6
3x=-42/:3
y=6
x=-14
y=6
Proszę :)