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anonymous
 one year ago
7x  3y = 4
2x  4y = 1
Which of the following systems is not the same as solving the system shown?
28x  12y = 16 and 6x + 12y = 3
14x  6y = 4 and 14x + 28y = 1
28x + 12y = 16 and 28x  56y = 14
anonymous
 one year ago
7x  3y = 4 2x  4y = 1 Which of the following systems is not the same as solving the system shown? 28x  12y = 16 and 6x + 12y = 3 14x  6y = 4 and 14x + 28y = 1 28x + 12y = 16 and 28x  56y = 14

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.07x−3y=4;2x−4y=1 Step: Solve 7x−3y=4 for x: 7x−3y+3y=4+3y(Add 3y to both sides) 7x=3y+4 7x7=3y+47(Divide both sides by 7) x=37y+47 Step: Substitute (37y+47) for x in 2x−4y=1: 2x−4y=1 2(37y+47)−4y=1 −227y+87=1(Simplify both sides of the equation) −227y+87+−87=1+−87(Add (8)/7 to both sides) −227y=−17 −227y−227=−17−227(Divide both sides by (22)/7) y=122 Step: Substitute (122) for y in x=37y+47: x=37y+47 x=37(122)+47 x=1322(Simplify both sides of the equation) Answer: x=1322 and y=122

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0you can do it this way look at each equation in one of the options if the equations are the result of multiplying each term by the same constant then the equations are the same do the above with each of the 3 sets

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0for example try option 1 28x  12y = 16 is obtained by multiplying 7x 3y = 4 by 4

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0and 6x + 12y = 3 is obtained by multiplying 2x  4y = 1 by 3 so the first option is the same as the original equations

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0so try options 2 and 3 the same way

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0to start you off the first equation in second set 7x  3y = 4 is multiplied by 2  did they do it correctly?

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0oh!!  talking to myself again!
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