Question

solucao do sistema de equaçao:{7x+3y=41
{8x-5y=30

Answer 1

7x+3y =41 (x5)
8 x -5y =30 (x3)
anula o y
35x+15y = 205
24x-15 y= 90
59x=295
x = 5
substituir o x
8x-5y=30
8.5-5y=30
40-5y=30
-5y =-40+300
-5y =-10 (-1)
y=10/5
y =2
☺