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Svetllana [295]
2 years ago
14

3) Solve these problems that have more than one answer.

Mathematics
2 answers:
SpyIntel [72]2 years ago
7 0
The answer should be 225
MaRussiya [10]2 years ago
5 0

Answer:

225

Step-by-step explanation:

Mary = 3x (3 times Carey)

Carey = x

Barry = x/2 (Because Carey read twice as many as Barry, it means he read half the amount Carey did)

3x + x + x/2 = 405

4x + x/2 = 405

8x/2 + x/2 (treat these as fractions) = 405

9x/2 = 405

9x = 810 (cross multiply)

x = 90

Mary = 3(90)      270

Carey =              90

Barry = 90/2      45

Mary - Barry

270 - 45 = 225

Hope this helps! :)

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