Question

6x-3y=20

4x=3Y=40

RESOLVER NO METODO DA ADIÇÃO 

Answer 1

6x-3y=20 (-1)
4x-3y=40

6x+3y=20
4x-3y=40
10x=60
x=6

Answer 2

$\left \{ {{6x-\not3y=20} \atop {4x+\not3y=40}} \right.$

$10x=60$

$x= \frac{60}{10}$

$\boxed{x=6}$

$4x+3y=40\\3y=40-4x\\3y=40-4.6\\3y=16$

$\boxed{y=\frac{16}{3}}$