Question

Resuelve los siguientes sistemas
1) 2x=5y-9
x+4y=2

2)4x+3y=10
7x-2y=3

Answer 1

2x-5y=-9
x+4y=2 (-2)

2x-5y=-9
-2x-8y=-4
---------------
/ -13y=-13
y=-13/-13
y=1

x+4y=2
x+4(1)=2
x+4=2
x=2-4
x=-2


4x+3y=10 (2)
7x-2y=3 (3)

8x+6y=20
21x-6y=9
-----------------
29x / =29
x=29/29
x=1



7x-2y =3
7(1)-2y=3
7-2y=3
-2y=3-7
-2y=-4
y=-4/-2
y=2