Rozwiąż równania A) 4(x+2)-3(y-1)=x+y-33(x-4)-2(y-2)=4(x-y)+4b) 4x-5y=-4-2x+3y=1,1c)
3x-2y=52x-y=4
a) 4(x+2)-3(y-1)=x+y-33(x-4)-2(y-2)=4(x-y)+4
4x+8-3y+3 = x+y+3
3x-12-2y+4 = 4x-4y+4
-3y-y+4x-x = 3-8-3
-2y+4y+3x-4x = 4+12-4
-4y+3x = -8
2y-x = 12 |*2
4y-2x = 24
_____________
x = 16
4y-2*16 = 24
4y-32 = 24
4y = 56 |:4
y = 14
b) 4x-5y=-4-2x+3y=1,1 |*2
4x-5y = -4
-4x+6y = 2,2
y = -1,8
4x-5*(-1,8) = -4
4x+9 = -4
4x = -4-9
4x = -13 |:4
x = -3,25
c)
3x-2y=5
-y = 4-2x |*(-1)
y = -4+2x
3x-2*(-4+2x)=5
3x+8-4x = 5
3x-4x = 5-8
-x = -3 |*(-1)y = -4+2x
x = 3
y = -4+2*3
y = -4+6
y = 2
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a) 4(x+2)-3(y-1)=x+y-3
3(x-4)-2(y-2)=4(x-y)+4
4x+8-3y+3 = x+y+3
3x-12-2y+4 = 4x-4y+4
-3y-y+4x-x = 3-8-3
-2y+4y+3x-4x = 4+12-4
-4y+3x = -8
2y-x = 12 |*2
-4y+3x = -8
4y-2x = 24
_____________
x = 16
4y-2*16 = 24
4y-32 = 24
4y = 56 |:4
y = 14
b) 4x-5y=-4
-2x+3y=1,1 |*2
4x-5y = -4
-4x+6y = 2,2
_____________
y = -1,8
4x-5*(-1,8) = -4
4x+9 = -4
4x = -4-9
4x = -13 |:4
x = -3,25
y = -1,8
c)
3x-2y=5
2x-y=4
3x-2y=5
-y = 4-2x |*(-1)
3x-2y=5
y = -4+2x
3x-2*(-4+2x)=5
y = -4+2x
3x+8-4x = 5
y = -4+2x
3x-4x = 5-8
y = -4+2x
-x = -3 |*(-1)
y = -4+2x
x = 3
y = -4+2*3
x = 3
y = -4+6
x = 3
y = 2
W załączniku.Liczę na Naj