Question 1134063
x and y
(x+y)/4=10, so x+y=40
(x-y)*3=18
x-y=6
add the two
2x=46
x=23
y=17
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the whole sum=40 so x+y=40
2(x-y)=8 so x-y=4
add them
2x=44
x=22
y=18
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5D+6W=659
7D+4W=641
multiply top by 2 and bottom by -3 to eliminate W
10D+12W=1318
-21D-12W=-1923
-11D=-605
D=55
W=64