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anonymous
 4 years ago
x − 7y = 20
x + 12y = −1
find the value for y
anonymous
 4 years ago
x − 7y = 20 x + 12y = −1 find the value for y

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anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Hi marmar, so do you know the substitution method?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Basically we're looking to build an equation that only has one variable

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0\[x  7y = 20\] becomes: \[x = 20 + 7y\]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0So can you write your second equation using this value for x?

myininaya
 4 years ago
Best ResponseYou've already chosen the best response.1That is one way you could multiply your first equation by 1 and then add the equations.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Good point myin  that's probably easier here huh?

myininaya
 4 years ago
Best ResponseYou've already chosen the best response.1Maybe they like your better.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0I ALWAYS think in terms of substitution  to a fault ;)

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0wow two moderators on one problem!

myininaya
 4 years ago
Best ResponseYou've already chosen the best response.1Do you prefer substitution or elimination @ marmar? (

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Ha satellite  two moderators, a resident expert, and no question asker...
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