Proszę o szybką odpowiedz bardzo proszę!
45/55
rozwiąż uklady rownań
d)
{5x-1=3y
{1,6y-2=4-2x
odp
x=1,4
y=2
e)
{-x-y=2
{2(3x+y)=-20
odp
x=-4
y=2
f)
{4x+3y=54
{1/3x=4(1+1/8y)
odp
x=13
y=2/3
P.S Z gory dzięki
d)
e)
{-x-y=2
{2(3x+y)=-20
{-x-y=2|*2
{6x+2y=-20
{-2x-2y=4
{6x+2y=-20
4x= -16|:4
{x=-4
{6*(-4)+2y=-20
{x=-4
{-24+2y=-20
{x=-4
{y=2
f)
{4x+3y=54
{1/3x=4(1+1/8y)
{4x+3y=54
{1/3x-1/2y=4|*6
{4x+3y=54
{2x-3y=24
6x=78|:6
{x=13
{4*13+3y=54
{x=13
{54+2/3*3=54
{x=13
{y=2/3
:))
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