Question

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Equação Linear, resolva:

{ x+y=3
{ 8×+8y=24

Answer 1

$\left \{ {{x+y=3} \atop {8x+8y=2}} \right. = \left \{ {{y=3-x} \atop {8x+8y=2}} \right. = \left \{ {{y=3-x} \atop {8x+8(3-x)=2}} \right. = \left \{ {{y=3-x} \atop {8x+24x=24}} \right.= \left \{ {{y=3-x} \atop {32x=24}} \right. \\ = \left \{ {{y=3-x} \atop {x=24/32}} \right. = \left \{ {{y=3-x} \atop {x=0,75}} \right. = \left \{ {{y=3-0,75} \atop {x=0,75}} \right.= \left \{ {{y=2.25} \atop {x=0,75}} \right.$