How do you solve the following system?: $x +7y = 3 , 12x + 3y = -2$

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Answer 1 · 2018-07-09T07:02:58

Multiply the first equation by 12

$12x+84y=36$

We have $12x$ in both equations so subtract the second equation from the first

$12x+84y=36$
$12x+3y= -2$

$81y=38$

$y=38/81$

Substitute this into equation two

$12x+3xx38/81= -2$

$12x+38/27= -2$

$12x= -92/27$

$x= -23/81$

How do you solve the following system?: x +7y = 3 , 12x + 3y = -2x +7y = 3 , 12x + 3y = -2