Locomotive

Whole loaded train weighs 760 tons. It has twenty wagons, each carrying 20 tons of grain and empty weighs 10 tons. How much weight a locomotive?

Result

x =  160 t

Solution:

a=20+10=30 t x=760−20⋅ a=760−20⋅ 30=160 ta=20+10=30 \ \text{t} \ \\ x=760-20 \cdot \ a=760-20 \cdot \ 30=160 \ \text{t}

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