Question

resolva os sistemas A x=9-3y 3x+2y=6

Answer 1

x=9-3y
3x+2y=6

3(9-3y)+2y = 6 ==> 27 - 9y+2y=6 ==> -7y=6-27 => -7y= -21(-1)=>7y=21=>y=3

x = 9 - 3(3) ==> x= 9 - 9 ==> x = 0