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mckenzieandjesus
 one year ago
Find a solution to the following system of equations.
3x+3y = 9
3x + y = 7
mckenzieandjesus
 one year ago
Find a solution to the following system of equations. 3x+3y = 9 3x + y = 7

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mckenzieandjesus
 one year ago
Best ResponseYou've already chosen the best response.0(–5, –8) (5, 2) (–2, 2) (0, 7)

mckenzieandjesus
 one year ago
Best ResponseYou've already chosen the best response.0@texaschic101

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0the first course of action here is to eliminate a variable.....either x or y, it does not matter. I believe it would be easier to eliminate the x's. 3x + 3y = 9  multiply everything by 1 3x + y = 7  3x  3y = 9 (result of multiplying by 1) 3x + y = 7 add 2y = 16  divide by 2 y = 8 then sub 8 back in for y in either of the original equations to find x do you have any questions about what I just did ?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0now if you wanted to eliminate the y's instead of the x's, you would have multiplied the second equation by 3.....then added the equations together. But either way, you should arrive at the same answer.

mckenzieandjesus
 one year ago
Best ResponseYou've already chosen the best response.0@texaschic101

mckenzieandjesus
 one year ago
Best ResponseYou've already chosen the best response.0@LegendarySadist can u help?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Just sub y=8 back into 3x + y = 7 and solve for x.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Whoops, that would be y=8

mckenzieandjesus
 one year ago
Best ResponseYou've already chosen the best response.0@LegendarySadist

mckenzieandjesus
 one year ago
Best ResponseYou've already chosen the best response.0@jim_thompson5910

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1hopefully you understand how y = 8 what you do from here is replace every copy of 'y' in an equation like 3x + y = 7 and solve for x 3x + y = 7 3x + (8) = 7 ... replace y with 8 3x  8 = 7 3x  8+8 = 7+8 ... Add 8 to both sides. 3x + 0 = 15 3x = 15 3x/(3) = 15/(3) ... Divide both sides by 3 to fully isolate x. 1x/1 = 5 1x = 5 x = 5

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1So together, x = 5 and y = 8 forming the ordered pair (5,8) if you were to graph the two lines, the point (5,8) would be on both lines. It is the point of intersection between the two lines

mckenzieandjesus
 one year ago
Best ResponseYou've already chosen the best response.0Yes I understand and oh okay thank you
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