Question

resolva {x+3y=11/4x-3y=9

Answer 1

x + 3y = 11

4x - 3y = 9

5x = 20

x = 20/5

x = 4

x + 3y = 11

4 + 3y = 11

3y = 11 - 4

3y = 7

y = 7/3

(4, 7/3)

Answer 2

resolva

vou usar método adição


{x+3y=11
{4x-3y=9
--------------(+)
5x=20
x=20/5
x=4


x+3y=11
4+3y=11
3y=11-4
3y= 7
y= 7/3


s={ ( 4 , 7/3)}