Rozwiąż Równania:
a) {y-x=4
{3(x+y)=24
b) {3x-1=y-2
{4x-3=-2(y-2)
Sory za znaki na przodzie ale nie umie rysowac tej klamerki :D
Prosze o pomoc:)
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a)
y-x=4
3(x+y)=24
-x + y = 4
x + y = 8
--------------
2y = 12
y = 6
x + 6 = 8
x= 8 - 6
x= 2
x = 2
y = 6
b)
{3x-1=y-2
{4x-3=-2(y-2)
3x - y = -1
4x - 3 = -2y + 4
3x - y = -1---- / * 2
4x + 2y = 7
6x - 2y = -2
4x + 2y = 7
---------------
10x = 5
x = 1/2
3/2 - y = -1
-y = -1 - 3/2
-y = -2,5
y = 2,5
x = 0,5
y = 2,5
{ y - x = 4 //*3
{ 3(x+y) = 24
{ 3y - 3x = 12
{ 3x + 3y = 24
6y = 36 //:6
y = 6
y - x = 4
6 - x = 4
-x = 4 - 6
-x = -2 //*-1
x = 2
{ 3x-1=y-2
{ 4x-3=-2(y-2)
{ 3x - y = -2 + 1
{ 4x - 3 = -2y + 4
{ 3x - y = -2 + 1 //*2
{ 4x + 2y = 4 + 3
{ 6x - 2y = -2
{ 4x + 2y = 7
10x = 5 //:10
x = 0,5
4x + 2y = 7
2 + 2y = 7
2y = 7 - 2
2y = 5 //:2
y = 2,5