yah57
12.02.2020 •
Mathematics
Two trains, Train A and Train B, weigh a total of 198 tons. Train A is heavier than Train B. The difference of their weights is 30 tons. What is the weight of each train?
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Ответ:
A: 114, B: 84
Step-by-step explanation:
Let A be weight of Train A, B be weight of Train B. Since A is heavier than B by 30 tons, A = B + 30. Since A + B = 198, you can substitute for A to get (B+30) + B = 198. Then simplify so 2B = 168 and B = 84.
Then plug B into A = B+30 to get A = 114.
Ответ:
Step-by-step explanation: