Respuesta:
3x-y=10
10x-5y=25
y=10-3x
10x-5(10-3x)=25
10x-50-15x)=25
10x+15x=25+50
25x=75
x=75/25
x=3
3x-y=5
3(3)-y=5
9-y=5
y=5-9
y=4
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Respuesta:
3x-y=10
10x-5y=25
3x-y=10
y=10-3x
10x-5y=25
10x-5(10-3x)=25
10x-50-15x)=25
10x+15x=25+50
25x=75
x=75/25
x=3
3x-y=5
3(3)-y=5
9-y=5
y=5-9
y=4