Respuesta:
Problema N°01 x=100 y=100 Problema N°02 x=-17 y=30
Explicación paso a paso:Problema N°01
x+4y=500
x=500-4y
2(500-4y)+y=300
1000-8y+y=300
-7y=300-1000
-7y=-700
y=100
x+4(100)=500
x+400=500
x=100
Problema N°02:
2x+5y=-20
2x+y=-4
y=-4-2x
8x+3(-4-2x)=-46
8x-12-6x=-46
2x=-46+12
2x=-34
x=-17
8(-17)+3y=-46
-136+3y=-46
3y=-46+136
3y=90
y=30
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Respuesta:
Problema N°01 x=100 y=100 Problema N°02 x=-17 y=30
Explicación paso a paso:Problema N°01
x+4y=500
x=500-4y
2(500-4y)+y=300
1000-8y+y=300
-7y=300-1000
-7y=-700
y=100
x+4(100)=500
x+400=500
x=100
Problema N°02:
2x+5y=-20
2x+y=-4
y=-4-2x
8x+3(-4-2x)=-46
8x-12-6x=-46
2x=-46+12
2x=-34
x=-17
8(-17)+3y=-46
-136+3y=-46
3y=-46+136
3y=90
y=30