a) =6a do sześcianu-3ab-a do sześcianu-b+ab kwadrat+b+3a kwadrat b-6ab=6a do szescianu-9ab+2a kwadrat b+ab kwadrat+b
{x+3y=3 {x-y=5
{x=3-3y{x-y=5
{x=3-3y{3-3y-y=5
{x=3-3y{-4y=2
{x=3-3y{y=-2
{x=3-3(-2){y=-2
{x=3+6{y=-2
{x=9{y=-2
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a) =6a do sześcianu-3ab-a do sześcianu-b+ab kwadrat+b+3a kwadrat b-6ab=6a do szescianu-9ab+2a kwadrat b+ab kwadrat+b
{x+3y=3 {x-y=5
{x=3-3y{x-y=5
{x=3-3y{3-3y-y=5
{x=3-3y{-4y=2
{x=3-3y{y=-2
{x=3-3(-2){y=-2
{x=3+6{y=-2
{x=9{y=-2