Question

Resolva o sistema
5x+3y=11
6x-y=4

Answer 1

5x+3y=11
6x-y=4 ×3

5x+3y=11
18x-3y=12

23x=23
X=23/23
X=1

5. (1)+3y=11
3y=11-5
3y=6
y=6/3
y=2

S: {1,2}