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anonymous
 4 years ago
Solve using the elimination method 7x + 7y = 7
x + 2y = 2 pleas explain I do not get this at all
anonymous
 4 years ago
Solve using the elimination method 7x + 7y = 7 x + 2y = 2 pleas explain I do not get this at all

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Akshay_Budhkar
 4 years ago
Best ResponseYou've already chosen the best response.1ok let us go step by step

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0step one is do divide the first equation by 7 to make your life simpler. you get \[x+y=1\] and now i shut up

Akshay_Budhkar
 4 years ago
Best ResponseYou've already chosen the best response.1\[7x + 7y 7 \therefore x+y =1 \therefore x=y1\]

precal
 4 years ago
Best ResponseYou've already chosen the best response.17x+7y=7 x+2y=2 The goal is to eliminate the x's or the y's It is your choice

precal
 4 years ago
Best ResponseYou've already chosen the best response.1or you could mutiply 7 to the second equation

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0ok now i put in my two cents again. says "elimination" not "substitution" although i would use the second method as well

precal
 4 years ago
Best ResponseYou've already chosen the best response.1Technically the method does not matter but since it did say elimination it is better to cancel out the x's or the y's I am choosing to get rid of the x's by multiplying 7 to equation 2

Akshay_Budhkar
 4 years ago
Best ResponseYou've already chosen the best response.1substituting that in equation 2 we have\[\begin {array} x x+2y=2 \\ y1+2y=2 \\ 3y=3 \\ y=1 \end {array}\]

Akshay_Budhkar
 4 years ago
Best ResponseYou've already chosen the best response.1didnt read elimination sorry

Akshay_Budhkar
 4 years ago
Best ResponseYou've already chosen the best response.1ok in this you can solve by subtracting the two equations that is x+y=1 and x+2y=2.. you get 2yy=21 therefore y=1

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0ok I get it sorry didnt get it at first

Akshay_Budhkar
 4 years ago
Best ResponseYou've already chosen the best response.1so is it fine now?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Yes it is thank you so much I get it now i hope

Akshay_Budhkar
 4 years ago
Best ResponseYou've already chosen the best response.1if u have any doubt clear it =D all the best

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0I thought it would be 2yy=2/1

precal
 4 years ago
Best ResponseYou've already chosen the best response.1I will do it for you using elimination

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0i just need the process explained to me it just is not clicking im sorry

precal
 4 years ago
Best ResponseYou've already chosen the best response.17x+7y=7 x+2y=2 7x+7y=7 7(x+2y=2) 7x+7y=7 7x14y=14 add equations together 7y=7 divide by 7 to both sides y=1 x+2y=2 x+2(1)=2 x+2=2 2 both sides x=0 solution x=0 and y=1

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0ok this makes since to me thank you

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0so this would be and infanite solution correct because it would graph as the same line not two intersecting line?

precal
 4 years ago
Best ResponseYou've already chosen the best response.1Another name for this method is called multiplication and addition method First you pick a number to multiply one of the equations then you add both equations together goal is to get rid of the x's or the y's that is why is is called elimination. If you wanted to get rid of the the y's instead you would have to multiply 2 to the first equation and then 7 to the second equation this will produce 14y and 14y and then you would have solve for x first. Many ways to eliminate x's or y's

precal
 4 years ago
Best ResponseYou've already chosen the best response.1No this is one solution because we were able to find the point of intersection

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0oh ok so what would a infanite solution look like?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0sorry to ask so many questions, but I really want to grasp this and I am having a really hard time

precal
 4 years ago
Best ResponseYou've already chosen the best response.1infinite solutions is the same line given in multiple form example x+y=4 2x+2y=8 did you notice they are the same I only multiply 2 to the original equation

precal
 4 years ago
Best ResponseYou've already chosen the best response.1No solution is 2 parallel lines, they never cross. look for same slopes y=2x+3 y=2x+6

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0thank you so much for explaining this I understand it so much better now than i did from the book

precal
 4 years ago
Best ResponseYou've already chosen the best response.1The number of solutions is determined by the number of times the equations cross: One solution means they cross in one place (X,Y) No solution means they do not cross (Parallel lines) Infinitely many solution means they cross in many places (because they are the same line)
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