(x+y)/25+(a-b)/5-(1/5)[a-b-(24/5)(x+y)]
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(x+y)/25+(a-b)/5-(1/5)[a-b-(24/5)(x+y)](x+y)/25+(a-b)/5-(1/5)[a-b-(24/5)(x+y)](x+y)/25+(a-b)/5-(1/5)
(x+y)/25+(a-b)/5-(1/5)[a-b-(24/5)(x+y)]
(x+y)/25+(a-b)/5-(1/5)[a-b-(24/5)(x+y)]
(x+y)/25+(a-b)/5-(1/5)[a-b-(24/5)(x+y)]
(x+y)/25+(a-b)/5-(1/5)[a-b-(24/5)(x+y)]
=(x+y)/25+(a-b)/5-(1/5)(a-b)+(1/5)(24/5)(x+y)
=(x+y)/25+0+(24/25)(x+y)
=x+y
25x+25y
原式=(x+y)/25+(a-b)/5-1/5(a-b)+24/25(x+y)=x+y
(x+y)/25+(a-b)/5-(1/5)[a-b-(24/5)(x+y)]
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