Question

resolva o sistema usando a regra de cramer { x+2y=5 {2x-3y=3

Answer 1

2x-3y=-5 x+2y=8 
D= l 2 -3 l l 1 2 l= 4-(-3)= 4+3=7 
DX= l -5 -3 l l 8 2 l= -10-(-24)= -10+24=14 
DY= l 2 -5 l l 1 8 l= 16-(-5)= 16+5=21 x=14/7=2 y=21/7=3 (2, 3)