Can someone help me solve this plsss i really need help with it NO LINKS AND NO DOING IT JUST FOR THE POINTS Will Give brainliest show your work and explain how you got your answer

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15

Aswimming pool had 2.5 million liters of water in it. some water evaporated, and then the pool only had 22 million liters of water in it. what percent of the water evaporated?

Avery’s piggy bank has 300 nickels, 450 pennies, and 150 dimes. she randomly picks three coins. each time she picks a coin, she makes a note of it and puts it back into the piggy bank before picking the next coin.