SOLUTION: 2x+3y=-3 x+2y=2 This is the problem and my daughters teacher gave her this: -2R1+R2 Please explain how this is done

Question 213891: 2x+3y=-3
x+2y=2
This is the problem and my daughters teacher gave her this: -2R1+R2
Please explain how this is done
Answer by drj(1380) (Show Source): You can put this solution on YOUR website!
2x+3y=-3
x+2y=2

The following solves the system of linear equations by substitution.

Solved by pluggable solver: SOLVE linear system by SUBSTITUTION

Solve:
We'll use substitution. After moving 3*y to the right, we get:
, or . Substitute that
into another equation:
and simplify: So, we know that y=7. Since , x=-12.

Answer: .

I hope the above steps were helpful and I don't understand the statement: -2R1+R2

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
RELATED QUESTIONS
Solve this equation using matrices. 2x-3y+z=5 x+3y+8z=22 3x-y+2z=12 I have already... (answered by rwm)

If the perimeter equals 86 meters squared. How do i solve for "x" if the length is... (answered by stanbon)

Please explain how to solve this limit problem lim ->0 (e^x-1)/x I know my teacher (answered by solver91311)

Please help me with this. foci (-2, 3) and (4, 3) b=4. This is only the problem the... (answered by MathLover1)

Which elementary row operation will reduce the x - element in row 2 to 0 in this... (answered by ikleyn)

I am not sure what my daughter teacher is wanting done on this problem, which is not from (answered by rapaljer)

can someone please breakdown the process of elimination in algerbra???? here is an... (answered by checkley77)

How to find the zero's of: P(x) = x^2 - x^2 - 6x and P(x) = x^4 - 3x + 2x Please... (answered by josgarithmetic)

please help me solve and understand this problem my math teacher gave me this work to... (answered by ankor@dixie-net.com)