Question

Sistema de equaçoēs. {X+2y=7. 2x+y=8

Answer 1

[tex] \left \{ {{x+2y= 7} (-2) \atop {2x+y=8}} \right.

\left \{ {{-2x-4y= -14} \atop {2x+y=8}} \right.

-3y= -6 x(-1)
y= \frac{6}{3}

y= 2
x+2y= 7
x+2(2)= 7
x+4= 7
x= 7-4
x= 3
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