x*4+1/2*x=55,35
=x*(4+1/2)=55,35
=x*4,5=55,35
=55,35:4,5
=12,3
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x*4+1/2*x=55,35
=x*(4+1/2)=55,35
=x*4,5=55,35
=55,35:4,5
=12,3
