Question

Resolvam os sistemas
a) X + 5y = 3
2X + 3y = 13

B) 5X +3y = 11
6X - y = 4​

Answer 1

Resposta:

a) x + 5y = 3 (-2)

2x + 3y = 13

-2x -10y = -6

2x + 3y = 13

-7y = 7

y = -7/7

y = -1

2x + 3.(-1) = 13

2x -3 = 13

2x = 13 + 3

2x = 16

x = 16/2

x = 8

b)

5x + 3y = 11

6x - y = 4 (3)

18x - 3y = 12

5x + 3y = 11

23x = 23

x = 23/23

x = 1

5.1 + 3y = 11

5 + 3y = 11

3y = 11 - 5

3y = 6

y = 6/3

y = 2

Bons estudos!