Question

6x+y=2
5x+2y=11
método de substituição

Answer 1

Olá!

6x+y=2
5x+2y=11

y=2-6x
5x+2y=11

y=2-6x
5x+2(2-6x)=11

y=2-6x
5x+4-12x=11

y=2-6x
-7x=11-4

y=2-6x
-7x=7


y=2-6x
x=-1

y=2-6(-1)
x=-1

y=2+6
x=-1

y=8
x=-1

Sol={-1; 8}