Question

Opera
Encuentre la solución del sistema
2x+5y =10
-9x+5y=-45

Answer 1

* 2x+5y =10
* -9x+5y=-45

2x+5y =10
5y=10-2x

* -9x+5y=-45
-9x+5(10-2x)=-45
-9x+50-10x=-45
-19x+50=-45
45+50=19x
95=19x

$x = \frac{95}{19}$
x=5

* 2x+5y =10
2(5)+5y=10
10+5y=10
5y=0
y=5/0
y=0

x ,y =(5;0)