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anonymous
 one year ago
solve by using elimination.express answer as an ordered pair
2x5y=7
5x3y=11
anonymous
 one year ago
solve by using elimination.express answer as an ordered pair 2x5y=7 5x3y=11

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Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.2hint: we can multiply the first equation by 5, so the new first equation is: 10x25y=35 next we can multiply the second equation by 2, so we get: 10x6y=22 then we have this equivalent system: \[\Large \left\{ \begin{gathered} 10x  25y =  35 \hfill \\ 10x  6y = 22 \hfill \\ \end{gathered} \right.\] now, please subtract the second equation, from the first one, what equation do you get?

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.2hint: if we do that subtraction, we can write this: \[\Large \left( {10x  25y} \right)  \left( {10x  6y} \right) =  35  22\] please simplify

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0im confused im i supposed to subtract 35 and 22

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.2yes!: 3522=57

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.2now, please simplify the left side

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.2hint: \[\Large \begin{gathered} \left( {10x  25y} \right)  \left( {10x  6y} \right) = \hfill \\ \hfill \\ = 10x  25y  10x + 6y = ...? \hfill \\ \end{gathered} \]

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.2what are 15 and 4 ?

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.2here is the right step: dw:1440873623698:dw

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.2so we get this equation: \[\Large  19y =  57\] please solve for y

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.2now, please replace y with 3 into the first equation of the original system, what do you get?

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.2yes! and Iwe gaet the subsequent equation: \[\Large 2x  15 =  7\] please solve for x

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.2correct! so the solution of your system is: x=4 y=3

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0thank you for helping me i understand it now a little
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