2x+y=5
x-2y=5
x+y=7
x-y=-1
x+2y=1
2x+3y=0?
Soluções para a tarefa
Respondido por
4
A)
2x + y = 5 (2)
x - 2y = 5
4x+ 2y= 10
X-2y= 5(+)
---------------
5x =15
x= 15/5
x=3
2x + y = 5
2.3+y= 5
6+Y=5
Y = 5-6
Y = -1
B)
x + y =7
x - y = -1(+)
-------------
2x = 6
x=6/2
x= 3
x+y= 7
3+y=7
y= 7-3
y=4
C)
x+2y=1 (-2)
2x+3y=0
-2x-4y= -2
2x +3y = 0 (+)
-Y = -2 (-1)
Y = 2
x+2y=1
x+2.2= 1
x+4=1
x= 1-4
x= -3
2x + y = 5 (2)
x - 2y = 5
4x+ 2y= 10
X-2y= 5(+)
---------------
5x =15
x= 15/5
x=3
2x + y = 5
2.3+y= 5
6+Y=5
Y = 5-6
Y = -1
B)
x + y =7
x - y = -1(+)
-------------
2x = 6
x=6/2
x= 3
x+y= 7
3+y=7
y= 7-3
y=4
C)
x+2y=1 (-2)
2x+3y=0
-2x-4y= -2
2x +3y = 0 (+)
-Y = -2 (-1)
Y = 2
x+2y=1
x+2.2= 1
x+4=1
x= 1-4
x= -3
Perguntas interessantes