rozwiaz uklady rownan metoda przeciwnych wspolczynnikow
a)
{6x + 2y+7
9x-4y=0
b)
{6x+7y=0
-2x+3y=0
c)
{3x+2y=41
5x-8y=17
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
a)
6x + 2y=7/*2
9x-4y=0
12x+4y=14
9x-4y=0
--------------
21x=14
x=2/3
6x+2y=7
6*2/3+2y=7
4+2y=7
2y=3
y=1,5
b)
6x+7y=0
-2x+3y=0/*3
6x+7y=0
-6x+9y=0
------------
16y=0
y=0
6x+7y=0
6x+7*0=0
6x+0=0
6x=0
x=0
c)
3x+2y=41/*4
5x-8y=17
12x+8y=164
5x-8y=17
---------------
17x=181
x=10 i 11/17
3x+2y=41
3*10 i 11/17+2y=41
31 i 16/17+2y=41
2y=9 i 1/17
y=4 i 9/17