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26.04.2020 •
Mathematics
A car travelled from A to B at a speed of 30km/h and returned from B to A at 60 km/h. What was the average speed for the whole trip?
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Ответ:
k/4 + 3 = 14
k = 44
Step-by-step explanation:
Step 1: k + 12 = 56
Step 2: k = 56 - 12
Step 3: k = 44
Multiply both sides of the equation by 4Subtract from both sidesSubtract 12 from 56 to get 44