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If you mean that the sum of the two numbers is 20 and the product is 75, then

X+Y=20 and XY=75

solving for Y and substituting: Y=20-X and XY=X(20-X)

then X(20-X)=75 and 20X-X2=75

(20X-X2)-(20X-X2)=75-(20X-X2)

then X2-20X+75=0

factoring (X-5)(X-15)=0, so X=15 or X=5

if X=5, then Y=75/X=15

if X=15, then Y=75/X=75/15=5

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17y ago

What else can I help you with?