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L = 5*10 + (-3) = 50 - 3 = 47
P = 53
L ≠ P
L = 10 + (-3) = 7
P = 7
L = P
Para liczb nie spełnia układu równań (spełnia tylko jedno z równań)
zad 2
a)
{x+3y=0
{-x+y=4
--------------- +
4y = 4 /:4
y = 1
-x + 1 = 4
-x = 3 /*(-1)
x = -3
{x = -3
{y = 1
b)
{2x =4 /:2
{x-2y=-1
{x = 2
{2 - 2y = -1
{x = 2
{-2y = -3/:(-2)
{x = 2
{y = 1,5
c)
{x=y
{2x+y=6
{x = y
{2x + x = 6
{x = y
{3x = 6 /:3
{x = y
{x = 2
{x = 2
{y = 2