Question

Resolva pelo método da adição

Answer 1

Bom Dia!

Sistema;

$\left\{\begin{matrix}3x-2y=9\\x+y=4\\\end{matrix}\right.$

$\left\{\begin{matrix}3x-2y=9\\x+y=4(-3)\\\end{matrix}\right.$

$\left\{\begin{matrix}3x-2y=9\\-3x-3y=-12\\\end{matrix}\right.$

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Pelo método da adição;

3x-3x-2y-3y=9-12

-5y=-3 (-1)

5y=3

$\boxed{y=\boxed{\frac{3}{5}}}$

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$\boxed{x+y=4}$

x+3/5=4

x=4-3/5

$\boxed{x=\boxed{\frac{17}{5}}}$

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Att;Guilherme Lima