SOLUTION: 2x-3y=7 y=3x-7 substitution equations i am stuck please help

Question 71964This question is from textbook algebra
: 2x-3y=7
y=3x-7 substitution equations
i am stuck please help This question is from textbook algebra

Answer by Earlsdon(6294) (Show Source): You can put this solution on YOUR website!
Solve the system of equations by substitution:
1)
2) Substitute this for y in equation 1) and solve for x.
1a) Simplify and solve for x. Apply the distributive property.
Notice the change of sign (- to +) on the last term! Now combine like-terms.
Subtract 21 from both sides.
Divide both sides by -7.
Now substitute this value of x into either one of the two original equations and solve for y. Using equation 2):

The solution is: (2, -1)
Here's the graph:

Notice that the solution to this system of equations is the point of intersection of the two lines represented by the two equations.
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