Question

× = 3y - 1 2× + y = 12​

Answer 1

Resposta:

x=3y-1

2x+y=12

2x+y=12

2(3y-1)+y=12

6y-2+y=12

7y=12+2

7y=14

y=14/7

y=2

x=3y-1

x=3.2-1

x=6-1

x=5