Question

5x-2y=34
x+3y=-1
Pra amanhã urgente!!

Answer 1

{5x-2y=34

{x+3y=-1×(-5)

{5x-2y=34

{-5x-15y=5

$- 17y = 39 \times ( - 1) \\ 17y = - 39 \\ y = - \frac{39}{17}$

$x + 3y = - 1 \\ x + 3.( - \frac{39}{17} ) = - 1 \\ 17x - 117 = - 17 \\ 17x = 117 - 17 \\ 17x = 100$

$x = \frac{100}{17}$