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How do you solve $3 y - x = - 9$ $3y-x=-9$ and $2 y + 5 x = 11$ $2y+5x=11$ using substitution?

1 Answer

Jun 16, 2016

y=-2
x=3

Explanation:

$x = 3 y + 9$ $x=3y+9$

$5 x = 11 - 2 y$ $5x=11-2y$

so $3 y + 9 = \frac{11 - 2 y}{5}$ $3y+9=(11-2y)/5$

get y=-2
x=3

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