August 2018 1 54 Report
alguien puede ayudarme con estos 7 cálculos
a-b=2 a/b=4/3
x/y=8/7 x+y=30
x/y=4/3 x-y=4
14/a=18/b a+b=64
x/8=y/7 x-y=1
a/b=15/25 a+b=8
a/3=b/15 a+b=12

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