Rozwiąż podane układy metodą przeciwnych współczynników. Podaj rodzaj układu.
( te dwa znaczki "{" oznaczają jeden układ, wiecie o co chodzi ;) )
1) {6a - 21b = 228
{ a - 12b = 21
2) {2x + 2y = 8
{2x - 3y = -7
3) {4y + 2x = 10
{3x + 8y = 10
4) {4a + 2b = 10
{5a - 2b = -10
5) {5a + 8b = 14
{ 4a + 3b = 1
6) {4 (x-2) - (y-2) = 1
{ 10x - 2y = 18
7) {2x - 4 (y+1) = 10
{ 2 (x+3) - (1-y) = 9
8) {2x - y = 4
{ x + 2y = 7
9) {6x + 2y = 7
{9x - 4y = 0
10) {12y - x = 9
{3y - 1/3x = 1
11) {3x + y = -1
{4x + 3y = 2
Z góry baardzo dziękuje ! :))
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
1) {6a - 21b = 228
{ a - 12b = 21/*-6
{6a-21b=228
{-6a+72b=-126
----------------------
51b=102/51
b=2
6a-21b=228
6a-21*2=228
6a-42=228
6a=228+42
6a=270/6
a=45
{a=45
{b=2
2) {2x + 2y = 8
{2x - 3y = -7/*(-1)
{2x+2y=8
{-2x+3y=7
------------
5y=15/5
y=3
2x+2y=8
2x+2*3=8
2x+6=8
2x=8-6
2x=2/2
x=1
{x=1
{y=3
3) {4y + 2x = 10/*(-2)
{3x + 8y = 10
{-8y-4x=-20
{8y+3x=10
--------------
-x=-10/(-1)
x=10
3x+8y=10
3*10+8y=10
30+8y=10
8y=10-30
8y=-20/8
y=-2,5
{x=10
{y=-2,5
4) {4a + 2b = 10
{5a - 2b = -10
------------------
9a=0/9
a=0
4*0+2b=10
2b=10/2
b=5
5) {5a + 8b = 14/*4
{ 4a + 3b = 1/*5
{20a+32b=56
{-20a-15b=-5
-----------------
17b=51/17
b=3
5a+8b=14
5a+8*3=14
5a+24=14
5a=14-24
5a=-10/5
a=-2
{a=-2
{b=3
6) {4 (x-2) - (y-2) = 1
{ 10x - 2y = 18
{4x-8-y+2=1
{10x-2y=18
{4x-y-6=1
{10x-2y=18
{4x-y=1+6
{10x-2y=18
{4x-y=7/*(-2)
{10x-2y=18
{-8x+2y=-14
{10x-2y=18
----------------
2x=4/2
x=2
4x-y=7
4*2-y=7
8-y=7
-y=7-8
-y=-1/-1
y=1
{x=2
{y=1
8) {2x - y = 4
{ x + 2y = 7/*-2
{2x-y=4
{-2x-4y=-14
--------------
-5y=-10/-5
y=2
2x-y=4
2x-2=4
2x=4+2
2x=6/2
x=3
{x=3
{y=2
11) {3x + y = -1/*-3
{4x + 3y = 2
{-9x-3y=3
{4x+3y=2
-------------
-5x=5/-5
x=-1
3x+y=-1
3*-1+y=-1
-3+y=-1
y=-1+3
y=2
{x=-1
{y=2
1)
6a-21b=228
a-12b=21 /razy -6
6a-21b=228
-6a+72b=-126
51b=102
b=2
a-24=21
a=21+24
a=45
2)
2x+2y=8 / razy -1
3x-3y=-7
-2x-2y=-8
2x-3y=-7
-5y=-15
y=3
2x+6=8
2x=8-6
2x=2
x=1
3)
4y+2x=10 / razy -2
3x+8y=10
-8y-4x=-20
3x+8y=10
-x= -10
x=10
4y+20=10
4y=-10
y=-5/2
4)
9a=0
a=0
0+2b=10
2b=10
b=5
5)
5a+8b=14 /razy 4
4a+3b=1 /razy -5
20A+32B=56
-20A-15B=-5
17b=51
b=3
5a+24=14
5a=14-24
5a=-10
a=-2