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Could someone please help me with this?
For the following system, if you isolated y in the second equation to use the Substitution Method, what expression would you substitute into the first equation?
5x + 3y = 9
12x + 3y = 18
 one year ago
 one year ago
Could someone please help me with this? For the following system, if you isolated y in the second equation to use the Substitution Method, what expression would you substitute into the first equation? 5x + 3y = 9 12x + 3y = 18
 one year ago
 one year ago

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jim_thompson5910Best ResponseYou've already chosen the best response.1
If you isolate y in the second equation, then... 12x + 3y = 18 3y = 1812x 3y = 12x+18 y = 12x/3 + 18/3 y = 4x + 6 So you would substitute the expression 4x+6 in for 'y' in the first equation to go from 5x+3y = 9 to 5x+3(4x+6) = 9
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.1
From there, you can solve for x and then use that solution to find y.
 one year ago
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