George earned $50 shoveling snow for his neighbor this week. He earned
$25 the following week if he gave 2/5 of his earnings to
his sister, how much money did he give her?

One cell phone plan charges $20 per month plus $0.15 per minute used. a second cell phone plan charges $35 per month plus $0.10 per minute used. write and solve an equation to find the number of minutes you must talk to have the same cost for both calling plans.