SOLUTION: To make a flour mixture, a miller combined soybeans that cost $8.50 per bushel with wheat that cost 4.50 per bushel. How many bushels of each were used to make a mixture of 1000 b

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Let = bushels of soybeans to be used
Let = bushels of wheat to be used
given:
(1)
(2)
Multiply both sides of (2) by
and subtract from (1)
(1)
(2)


And, since
(2)


250 bushels of soybeans and 750 bushels of wheat were used
check:
(1)
(1)


OK