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1º x
2º 2x
3º x+2x
entonces:
sumamos todos:
2x+ x +x+2x-20 =196
6x-20=196
6x=196+20
6x=216
x=216/6
x=26
hallar mayor= reemplaza:
x+2x-20
36+2x36-20
36+72-20
108-20
88- rpta