Question 277817
3,600=36x+45y multiply this equation by -20 & add.
51,000=300x+900y
-72,000=-720x-900y
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-21,000=-420x
x=-21,000/-420
x=50 washing machines were on the truck.
3,600=36*50+45y
45y=3,600-1,800
45y=1.800
y=1,800/45
y=40 refrigerators wer eon the truck.
Proof:
51,000=300*50+900*40
51,000=15,000+36,000
51,000=51,000