Lorenzo collects stamps from around the world.

lorenzo has 147 u. s. stamps in his collection. he has 3 times as many as u. s. stamps as canadian stamps. how many canadian stamps does lorenzo have?
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lozenzo wants to put his u. s. and canadian stamps in an album. nine stamps fit on each pages will lorenzo use?
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x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

step-by-step explanation:

last month maria hiked the 5-mile mountain trail a number of times and she hiked the 10-mile canal trail several times. let x represent the number of times she hiked the 5-mile trail, and let y represent the number of times she hiked the 10-mile trail. if she hiked a total of 90 miles, which equation can be used to find the number of times maria hiked each trail? x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x