How do you solve by substitution `3x - y = -6` and `x + y = 2`?

Related questions

• How do you solve systems of equations using the substitution method?
• How do you check your solutions to a systems of equations using the substitution method?
• When is the substitution method easier to use?
• How do you know if a solution is "no solution" or "infinite" when using the substitution method?
• How do you solve `y=-6x-3` and `y=3` using the substitution method?
• How do you solve `12y-3x=-1` and `x-4y=1` using the substitution method?
• Which method do you use to solve the system of equations `y=1/4x-14` and `y=19/8x+7`?
• What are the 2 numbers if the sum is 70 and they differ by 11?
• How do you solve `x+y=5` and `3x+y=15` using the substitution method?
• What is the point of intersection of the lines `x+2y=4` and `-x-3y=-7`?