Question

Resolva O Sistema:
2x-2y=12 x+2y=11

Answer 1

2x - 2y = 12
x + 2y = 11

x = 11 - 2y 

2x - 2y = 12
2.(11 - 2y) - 2y = 12
22 - 4y - 2y = 12
-4y -2y = 12 - 22
-6y = -10 
y = -10/-6
y = 5/3

x = 11 - 2y 
x + 2(5/3) = 11

x + 10/3 = 11
x = 11 - 10/3

x = 23/3