book Maths Puzzle Numerical Ability

Two trains are traveling to the same city. The second train has to travel 264 miles in the same time the first train travels 228 miles. If the second train's rate of travel is 6

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Jill Loves math but she hates this problem
The sum of four numbers is 64.
If you add 3 to the first number,3 is subtracted form the secong number the third is multiplied by 3 and
How would I do this problem -4=5n+6?