Freight train

The train carries 525 tons of limestone in 29 wagons. Wagons are 15 tonne and 20 tons. How many are 15 ton, and how many are 20 ton wagons?

Final Answer:

x =  11
y =  18

Step-by-step explanation:

x+y=29 15 x+20 y=525  15 x+20 y=525  x+y=29 15x+20y=525  Pivot:Row1Row2  Row2151 Row1Row2 0.33y=6  y=0.333333336=18 x=1552520y=1552520 18=11  x=11 y=18



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