SOLUTION: x + y = 7 x + 3y = 11

Question 227843: x + y = 7
x + 3y = 11
Answer by drj(1380) (Show Source): You can put this solution on YOUR website!
Equation A
Equation B

Step 1. Subtract Equation A from Equation B (or Equation B - Equation A) to eliminate x

Step 2. Divide by 2 to both sides of the equation

Step 3. Now Substitute into equation A to find x

Subtract 2 from both sides to get x.

Step 4. Now we have and as a solution. Check to see if this also satisfies equation B .

which is a true statement

Step 5. ANSWER: The solution is and . Or the intersection point between these two lines is (5,2). See graph below,

I hope the above steps were helpful.

For free Step-By-Step Videos on Introduction to Algebra, please visit http://www.FreedomUniversity.TV/courses/IntroAlgebra or for Trigonometry visit http://www.FreedomUniversity.TV/courses/Trigonometry.

And good luck in your studies!

Respectfully,
Dr J

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