71.7k views
2 votes
Solve system of equations using substitution method

2x-3y=6
x + y = -12

User Regnauld
by
7.7k points

1 Answer

3 votes
So we can either use the substitution method for x or y.
Let’s do x
To isolate x in equation 2, we subtract y from both sides to get
X=-12-y
Now we know what x is in terms of y and an integer.
Plug back in
2(-12-y)-3y=6
-24-2y-3y=6
-24-5y=6
-5y=30
y=-6
We have the value of y now.
Let’s substitute it into the second equation.
X-6=-12
X=-6
So the solution is
(-6,-6)
User Probsolver
by
8.0k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories