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Mathematics 21 Online
OpenStudy (anonymous):

Solve this system of equations using substitution. Put your answer in ordered pair form, (x, y). x - 2y = -1 2x - y = 4

OpenStudy (anonymous):

x - 2y = -1 2x - y = 4

OpenStudy (anonymous):

To solve by substitution means solve one of the equations for one of your variables. Then plug that expression you get into the other equation for that variable.

OpenStudy (anonymous):

So pick an equation, and a variable that's easy to solve for..

OpenStudy (anonymous):

i dont know where to start on

OpenStudy (anonymous):

Step 1) Pick one of your two equations.

OpenStudy (anonymous):

i need the answer fast please

OpenStudy (anonymous):

No, you need to learn how to do this.

OpenStudy (anonymous):

okaay tell me how to start

OpenStudy (anonymous):

I did. Step 1) pick one of your two equations.

OpenStudy (anonymous):

Let me know which one you've chosen.

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