sally pays 25$ for two tubes of paint: a blue tube and tube .the blue tube cost $7 more then the red tube. how much did each tube cost
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let red tube be X
and blue tube be X+7
then
X+(X+7)=25
2X+7=25
2X=18
X=9
red tube be 9$
&
blue tube be 16$
ans....
and blue tube be X+7
then
X+(X+7)=25
2X+7=25
2X=18
X=9
red tube be 9$
&
blue tube be 16$
ans....
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