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phiBest ResponseYou've already chosen the best response.1
you used "substitution" BTW, y= 1/2 you substituted for y in the 2nd equation you could use "elimination" y = 1/2 x  6 or 2y = x 12 (multiply both sides by 2) or x 2y = 12 (added 2y to both sides and +12 to both sides) so your first equation in standard form is x2y=12 1x  2y =12 < multiply both sides by 2 2x + 6y = 19 after multiplying both sides (every term) by 2 you get 2x + 4y = 24 2x + 6y = 19 now add the 2 equations together term by term can you do that?
 one year ago

phiBest ResponseYou've already chosen the best response.1
I just gave the highlights can you do y = 1/2 x  6 becomes 2y= x12
 one year ago

phiBest ResponseYou've already chosen the best response.1
2y= x12 add 2y +12 to both sides 2y2y+12= x122y+12 can you simplify
 one year ago

phiBest ResponseYou've already chosen the best response.1
you get 12= x2y which we can write as x2y=12 (switching does not change anything)
 one year ago

phiBest ResponseYou've already chosen the best response.1
you mean 2 times both sides of x2y=12 ? 2(x2y) = 2*12 now simplify
 one year ago

phiBest ResponseYou've already chosen the best response.1
or should I say, "distribute" the 2 on the left and simplify on the right
 one year ago

phiBest ResponseYou've already chosen the best response.1
first, recheck your first equation 2(x2y) = 2*12 a minus times a minus give a plus
 one year ago

phiBest ResponseYou've already chosen the best response.1
Last step is to replace y with 1/2 in either equation and find x
 one year ago
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