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{-x + 1,5y = 2,5
{2x - 3y = 5
{-x + 3/2y = 2,5
{2x - 3y = 5
{-x = 2,5 - 3/2y /*(-1)
{2x - 3y = 5
{x = -2,5 + 3/2y
{2(-2,5 + 3/2y) - 3y = 5
{x = -2,5 + 3/2y
{-5 + 3y - 3y = 5
{x = -2,5 + 3/2y
{3y - 3y = 5 + 5
{x = -2,5 + 3/2y
{0 = 10
{x = -2,5 + 3/2y
Układ sprzeczny