Solve the following equation. x + 7 = 18, 9, 10, 11, 12, 2x = 24, 10, 11, 12, 13, 3x = 27, 9, 24, 11, 8, x − 9 = 6, 3, 15, -15, -3, x − 12 = 18, 16, 17, 31, 30, 4x = 36, 4, -9, 10, 9, 3x + 6 = 21, 5, 6, 4, 7, The initial temperature is x°C. After increasing by 15°C, the temperature becomes 40°C. What is the value of x ?, 30, 25, Ali has x pencils. After buying 9 more pencils, he has a total of 21 pencils. What is the value of x?, 12, 10, A wire is x cm long. After being extended by 18 cm, its length becomes 50 cm. What is the value of x?, 32, 35

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