Rozwiaż układy równań:
a){2(x-1)+(y+2)=4
{3(x+1)-(y-3)=7
b){3(x+2)+2(y-2)=1
{(x+2)-4(y-1)=1
c){-2(x-3)-(4-y)=0
{5(x+1)+3(2-y)=17
d){4(x+3)-2(y+1)=0
{2(y-1)-(3-x)=-10
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A ) 2x - 2 + x + 2 = 4
A ) 3x + 3 - y - 3 = 7
A ) 3 x = 4 | ( - 1 )
A ) 3 x - y = 7
A ) - 3 x = - 4
A ) 3 x - y = 7
A ) - y = 3 | ( - 1 )
A ) y = - 3
A ) 3x - ( - 3 ) = 7
A ) 3x = 4 | : 3
A ) x = 1,333 ...
B ) 3x + 6 + 2y - 4 = 1
B ) x + 2 - 4y + 4 = 1
B ) 3x + 2 + 2y = 1 | * 2
B ) x + 6 - 4y = 1
B ) 6x + 4 + 4y = 2
B ) x + 6 - 4y = 1
B ) 7x + 10 = 3
B ) 7x = - 7 | : 7
B ) x = - 1
B ) - 1 + 6 - 4y = 1
B ) - 4y = 4 | : ( - 4 )
B ) y = 1
C ) - 2x - 6 - 4 - y = 0
C ) 5x + 5 + 6 - 3y = 17
C ) - 2x - 10 - y = 0 | * 5
C ) 5x + 11 - 3y = 17 | * 2
C ) - 10x - 50 - 5y = 0
C ) 10x + 22 - 6y = 17
C ) - 28 - 11 y = 17
C ) - 11y = 17 + 28
C ) - 11y = 45 | : ( - 11 )
C ) y = około 4
C ) 10 x + 22 - 6 * 4 = 17
C ) 10x - 24 + 22 = 17
C ) 10x = 19 | : 10
C ) x = 1 , 9
D ) 4x + 12 - 2y - 2 = 0
D ) 2y - 2 - 3 + x = - 10
D ) 4x + 10 -2y = 0
D ) 2y - 6 + x = - 10
D ) 5x + 4 = - 10
D ) 5x = - 14 | : 5
D ) x = 2,8
D ) 2y - 6 + 2,8 = - 10
D ) 2y - 3,2 = - 10
D ) 2y = - 6,8 | : 2
D ) y = - 3,4
a){2(x-1)+(y+2)=4
{3(x+1)-(y-3)=7
2x-2+y+2=4
3x+3-y+3=7
2x+y=4
3x-y=1
y=4-2x
3x-(4-2x)=1
y=4-2x
3x-4+2x=1
y=4-2x
5x=5|:5
y=4-2x
x=1
y=4-2*1
x=1
y=4-2
x=1
y=2
x=1
b){3(x+2)+2(y-2)=1
{(x+2)-4(y-1)=1
3x+6+2y-4=1
x+2-4y+4=1
3x+2+2y=1
x+6-4y=1
3x+2y=-1
x-4y=-5
3x+2y=-1
x=-5+4y
3*(-5+4y)+2y=-1
x=-5+4y
-15+12y+2y=-1
x=-5+4y
14y=-1+15
x=-5+4y
14y=14|:14
x=-5+4y
y=1
x=-5+4
y=1
x=-1
c){-2(x-3)-(4-y)=0
{5(x+1)+3(2-y)=17
-2x+6-4+y=0
5x+5+6-3y=17
-2x+2+y=0
5x+11+3y=17
y=2x-2
5x+3*(2x-2)=6
y=2x-2
5x+6x-6=6
y=2x-2
11x=12|:11
y=2x-2
x=1,09
y=2*1,09-2
x=1,09
y=0,18
x=1,09
d){4(x+3)-2(y+1)=0
{2(y-1)-(3-x)=-10
4x+12-2y-2=0
2y-2-3+x=-10
4x-2y+10=0
2y-5+x=-10
4x-2y=-10
x=-10+5-2y
4x-2y=-10
x=-5-2y
4*(-5-2y)-2y=-10
x=-5-2y
-20-8y-2y=-10
x=-5-2y
-10y=-10+20
x=-5-2y
-10y=10 |:(-1)
x=-5-2y
y=-1
x=-5-2*(-1)
y=-1
x=-5+2
y=-1
x=-3