Three times the first of two numbers decreased by the second equals 9. Twice the first number increased by the second number equals 11. Find the two numbers. I've already sorted out the equations, I just don't get how to get my answers [substitution or addition method]

3x - y = 9
2x + y = 11

if I'm wrong w the written equation please tell me ='>

An empty bucket is placed under a faucet dripping at a constant rate of 4 milliliters per minute. with the given information, which of these statements is a reasonable conclusion? a there will be 24 milliliters of water in the bucket after 16 hour. b there will be 60 milliliters of water in the bucket after 14 hour. c there will be 160 milliliters of water in the bucket after 20 minutes. d there will be 100 milliliters of water in the bucket after 40 minutes.

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