Question

resolva o sistema :
x+y=2
6x+2y=10

Answer 1

x=2-y
6(2-y)+2y=10
12-6y+2y=10
-4y=-2 .(-1)
4y=2
y=2/4 
x=2-2/4
x=6/4

Answer 2

x+y= 2
x= 2-y

6x+2y=10
6(2-y)+2y=10 
12-6y+2y=10
12-4y=10
-4y=10-12
-4y=-2  x(-1)
4y=2
y=2/4 (simplificando por 2)
y=1/2

x=2-y
x=2-1/2
x= 3/2