Rozwiąż układy równań.
a){ -2(5x-2y)+4(2x+y)=1
{ 3(2x-y)-(y+7x)=5,5
Wynik {x=-3
{y=-5/8
b){ 2x-y/4+3x+5/2=3
{ x-7/5-2y+x/10=-1
Wynik {x=0
{y=-2
/ to kreska ułamkowa
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a){ -2(5x-2y)+4(2x+y)=1
{ 3(2x-y)-(y+7x)=5,5
-10x+4y+8x+4y=1
6x-3y-y-7x=5,5
-2x+8y=1
-x-4y=5,5 /*2
-2x+8y=1
-2x-8y=11
-4x=12
x=-3
-2*(-3)+8y=1
8y=1-6
8y=-5
y=-5/8
b){ 2x-y/4+3x+5/2=3 /*4
{ x-7/5-2y+x/10=-1 /*10
2x-y+6x+10=12
2x-14-2y-x=-10
8x-y=2 /*(-2)
x-2y=4
-16x+2y=-4
x-2y=4
-15x=0
x=0
0-2y=4
-2y=4
y=-2