X=3y-1

2x+y=12

Solve the system of equations using the substitution method

Substitute the top equation in as X in the 2nd equation.

2 (3y-1) + y=12

Simplify to:

6y-2+y=12

7y-2=12

Add 2 to both sides

7y=14

Divide 7 from both sides

y=2

Find X by substituting y in the first equation

X=3 (2) - 1

X=6-1

X=5

x=5 y=2