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Mathematics›Book 2›Chapter 1
Multiple choice

Equations

Read the complete problem, then answer its numbered subtasks.

35 exercises
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Exercise 30

Book 2 · Equations

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Subtask 1

4x−85 =4 :

Subtask 2

8x155−= :

Subtask 3

7x−5 =25 :

Subtask 4

cos2x=1: