SOLUTION: 3x-y=7, y=4x-11

Question 228648: 3x-y=7, y=4x-11
Answer by drj(1380) (Show Source): You can put this solution on YOUR website!
3x-y=7 Equation A
y=4x-11 or -4x+y=-11 Equation B

Step 1. Add Equations A and B to eliminate the y-variable.

or after multiplying by -1 to both sides of the equation.

Step 2. Substitute , into equation A

Add y-7 to both sides of the equation

Check if and satisfies Equation B

which it does.

Step 3. The solution is x=4 and y=-11.

I hope the above steps were helpful.

For FREE Step-By-Step videos in Introduction to Algebra, please visit http://www.FreedomUniversity.TV/courses/IntroAlgebra and for Trigonometry visit http://www.FreedomUniversity.TV/courses/Trigonometry.

Good luck in your studies!

Respectfully,
Dr J

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