Question

Me ajudem rsrs
Determine as soluções dos sistemas a) x+6y=5
2x-3y=5

B) 6x+y=5
-3x+2y=5

C)3x+5y=11
4x-5y=38

D)7x-3y=12
2x+3y=10

Answer 1

a) x + 6y = 5
2x - 3y = 5 . (2)

x + 6y = 5
4x - 6y = 10
==========
5x = 15
x = 15/5
x = 3

x + 6y = 5
3 + 6y = 5
6y = 5 - 3
6y = 2
y = 2/6
y = 1/3

s={ 3, 1/3 }


b) 6x + y = 5
-3x +2y = 5 . (2)

6x + y = 5
-6x + 4y = 10
=============
5y = 15
y = 15/5
y = 3


6x + y = 5
6x + 3 = 5
6x = 5 - 3
6x = 2
x = 2/3


s={ 3, 2/3 }