( )+49x( )=24 ( )x28-( )=21.6
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()+49x()=24()x28-()=21.6()+49x()=24()x28-()=21.6 ()+49x()=24()x28-()=21.6(0.48)+49x(0.48)=24(0.
( )+49x( )=24 ( )x28-( )=21.6
( )+49x( )=24 ( )x28-( )=21.6
( )+49x( )=24 ( )x28-( )=21.6
( 0.48)+49x(0.48 )=24
(0.8 )x28-(0.8 )=21.6