Question

APLICANDO O MÉTODO DA ADIÇÃO RESOLVA :
a) {x=6y
{2x-7y=-10
b){2x+3y=2
{4x-9y=-1

Answer 1

a ) {x-6y=0. * (-2)
{2x-7y=-10

-2x+6y=0
2x-7y = -10
-y=-10 *(-1)
y=10

x=6y
x=6*10
x=60


b){2x+3y=2 *3
{4x-9y=-1

6x+9y = 6
4x-9y=-1

10x=5
x=5/10
x=1/2

2x+3y=2
2 * (1/2) + 3y = 2
1+3y=2
3y=2-1
3y=1
y=1/3