rozwiąż równania:
{x+y=8
{y=x+2
{x+y=100g
{y=x+10
{3x+4y=17
{5x+2y=19
1 równanie
x+ x+2=8 y=3+2
2x=8-2 y=5
2x=6/2
x=3
2 równanie
x+x+10=100 y=45+10
2x=100-10 y=55
2x=90/2
x= 45
3 równanie
{5x+2y=19/*-2
{-10x-4y=-38
+ --------------------------
3x-10x=17-38 3x+4y=17
-7x=-21/-7 3*3+4y=17
x=3 9+4y=17
4y=17-9
4y=8/ 4
y=2
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1 równanie
x+ x+2=8 y=3+2
2x=8-2 y=5
2x=6/2
x=3
2 równanie
x+x+10=100 y=45+10
2x=100-10 y=55
2x=90/2
x= 45
3 równanie
{3x+4y=17
{5x+2y=19/*-2
{3x+4y=17
{-10x-4y=-38
+ --------------------------
3x-10x=17-38 3x+4y=17
-7x=-21/-7 3*3+4y=17
x=3 9+4y=17
4y=17-9
4y=8/ 4
y=2