Respuesta:
x+y=78
x+18=y
x+(x+18) =78
2x+18=78
2x=60
x=30
y=48
espero haberte ayudado :)
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Respuesta:
x+y=78
x+18=y
x+(x+18) =78
2x+18=78
2x=60
x=30
y=48
espero haberte ayudado :)