rozwiaz uklady rownan.rownania w zalaczniku
a){y+2-(3-x)=0
{x-2=5-(2-y)
{y+2-3+x=0
{x-2=5-2+y
{x+y=1
{x-y=5
2x=6 |:2
x=3
x+y=1
3+y=1
y=-2
Odp. x=2 i y=-2
b) {3(x-y)+4x=8
{3(x-5y)=5-9y
{3x-3y+4x=8
{3x-15y=5-9y
{7x-3y=8 |*(-2)
{3x-6y=5
{-14x+6y=-16
-11x=-11 |:(-11)
x=1
3x-6y=5
3*1-6y=5
-6y=5-3
-6y=2 |:(-6)
y=-2/6
y=-1/3
Odp. x=1 i y=-1/3
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a){y+2-(3-x)=0
{x-2=5-(2-y)
{y+2-3+x=0
{x-2=5-2+y
{x+y=1
{x-y=5
2x=6 |:2
x=3
x+y=1
3+y=1
y=-2
Odp. x=2 i y=-2
b) {3(x-y)+4x=8
{3(x-5y)=5-9y
{3x-3y+4x=8
{3x-15y=5-9y
{7x-3y=8 |*(-2)
{3x-6y=5
{-14x+6y=-16
{3x-6y=5
-11x=-11 |:(-11)
x=1
3x-6y=5
3*1-6y=5
-6y=5-3
-6y=2 |:(-6)
y=-2/6
y=-1/3
Odp. x=1 i y=-1/3