Roziąz układy równań:
1.
5x =4-2y
4x+y=3
2.
6x-3y=9
x+5y=-9,5
{5x =4-2y
{4x+y=3/*(-2)
{5x+2y=4
{-8x-2y=-6
-------------
-3x=-2
x=2/3
5*2/3+2y=4
10/3+2y=4
2y=4-3 i 1/3
2y=2/3
y=1/3
{6x-3y=9
{x+5y=-9,5/*(-6)
{-6x-30y=57
--------------------
-33y=66
y=-2
6x-3*(-2)=9
6x+6=9
6x=9-6
6x=3
x=1/2
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{5x =4-2y
{4x+y=3/*(-2)
{5x+2y=4
{-8x-2y=-6
-------------
-3x=-2
x=2/3
5*2/3+2y=4
10/3+2y=4
2y=4-3 i 1/3
2y=2/3
y=1/3
{6x-3y=9
{x+5y=-9,5/*(-6)
{6x-3y=9
{-6x-30y=57
--------------------
-33y=66
y=-2
6x-3*(-2)=9
6x+6=9
6x=9-6
6x=3
x=1/2