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solve each system by substitution 7x+2y=-19 -x+2y=21

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what we are solving for ?
what do you mean? it's the system and I need to solve it

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I think is solve for X?
okay =D!
here try this web site an let me know if this helps! ~Jess~
it's not free...I need a full steps,not only the answers
ya that only bad thing about that u have to sign up to it .
I signed up. And to see the steps they asked money...But thank you!
oh i am sorry i didn't know that !! never signed up to it i am sorry!!!
no problem. But thank you anyway

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