Clothes

Danka and Janka collect clothes. Danka had 9 more than Janka, so she gave her 7. Which now has more cloth and how many?

Result

x =  5

Solution:

d=9+j d2=d−7=9−7+j=j+2 j2=j+7  j2>d2 x=j2−d2=j+7−(j+2) x=7−2=5d = 9 + j \ \\ d_{ 2 } = d-7 = 9-7+j = j+2 \ \\ j_{ 2 } = j+7 \ \\ \ \\ j_{ 2 }>d_{ 2 } \ \\ x = j_{ 2 }-d_{ 2 } = j+7 - (j+2) \ \\ x = 7-2 = 5

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